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LibSQL: Parse most language expressions
https://sqlite.org/lang_expr.html The entry point to using expressions, parse_expression(), is not used by SQL::Parser in this commit. But there's so much here that it's easier to grok as its own commit.
This commit is contained in:
Timothy Flynn
Andreas Kling
parent
8c8d611fb3
commit
ce6c7ae18a
5 changed files with 1414 additions and 5 deletions
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@ -29,7 +29,10 @@
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#include <AK/NonnullRefPtr.h>
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#include <AK/NonnullRefPtrVector.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/String.h>
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#include <LibSQL/Forward.h>
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#include <LibSQL/Token.h>
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namespace SQL {
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@ -48,11 +51,9 @@ protected:
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ASTNode() = default;
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};
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class Statement : public ASTNode {
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};
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class ErrorStatement final : public Statement {
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};
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//==================================================================================================
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// Language types
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//==================================================================================================
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class SignedNumber final : public ASTNode {
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public:
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@ -100,6 +101,356 @@ private:
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NonnullRefPtr<TypeName> m_type_name;
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};
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//==================================================================================================
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// Expressions
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//==================================================================================================
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class Expression : public ASTNode {
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};
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class ErrorExpression final : public Expression {
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};
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class NumericLiteral : public Expression {
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public:
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explicit NumericLiteral(double value)
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: m_value(value)
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{
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}
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double value() const { return m_value; }
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private:
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double m_value;
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};
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class StringLiteral : public Expression {
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public:
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explicit StringLiteral(String value)
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: m_value(move(value))
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{
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}
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const String& value() const { return m_value; }
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private:
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String m_value;
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};
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class BlobLiteral : public Expression {
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public:
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explicit BlobLiteral(String value)
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: m_value(move(value))
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{
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}
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const String& value() const { return m_value; }
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private:
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String m_value;
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};
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class NullLiteral : public Expression {
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};
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class NestedExpression : public Expression {
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public:
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const NonnullRefPtr<Expression>& expression() const { return m_expression; }
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protected:
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explicit NestedExpression(NonnullRefPtr<Expression> expression)
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: m_expression(move(expression))
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{
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}
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private:
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NonnullRefPtr<Expression> m_expression;
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};
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class NestedDoubleExpression : public Expression {
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public:
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const NonnullRefPtr<Expression>& lhs() const { return m_lhs; }
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const NonnullRefPtr<Expression>& rhs() const { return m_rhs; }
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protected:
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NestedDoubleExpression(NonnullRefPtr<Expression> lhs, NonnullRefPtr<Expression> rhs)
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: m_lhs(move(lhs))
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, m_rhs(move(rhs))
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{
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}
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private:
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NonnullRefPtr<Expression> m_lhs;
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NonnullRefPtr<Expression> m_rhs;
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};
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class InvertibleNestedExpression : public NestedExpression {
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public:
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bool invert_expression() const { return m_invert_expression; }
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protected:
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InvertibleNestedExpression(NonnullRefPtr<Expression> expression, bool invert_expression)
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: NestedExpression(move(expression))
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, m_invert_expression(invert_expression)
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{
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}
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private:
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bool m_invert_expression;
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};
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class InvertibleNestedDoubleExpression : public NestedDoubleExpression {
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public:
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bool invert_expression() const { return m_invert_expression; }
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protected:
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InvertibleNestedDoubleExpression(NonnullRefPtr<Expression> lhs, NonnullRefPtr<Expression> rhs, bool invert_expression)
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: NestedDoubleExpression(move(lhs), move(rhs))
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, m_invert_expression(invert_expression)
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{
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}
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private:
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bool m_invert_expression;
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};
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class ColumnNameExpression : public Expression {
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public:
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ColumnNameExpression(String schema_name, String table_name, String column_name)
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: m_schema_name(move(schema_name))
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, m_table_name(move(table_name))
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, m_column_name(move(column_name))
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{
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}
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const String& schema_name() const { return m_schema_name; }
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const String& table_name() const { return m_table_name; }
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const String& column_name() const { return m_column_name; }
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private:
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String m_schema_name;
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String m_table_name;
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String m_column_name;
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};
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enum class UnaryOperator {
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Minus,
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Plus,
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BitwiseNot,
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Not,
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};
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class UnaryOperatorExpression : public NestedExpression {
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public:
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UnaryOperatorExpression(UnaryOperator type, NonnullRefPtr<Expression> expression)
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: NestedExpression(move(expression))
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, m_type(type)
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{
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}
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UnaryOperator type() const { return m_type; }
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private:
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UnaryOperator m_type;
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};
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enum class BinaryOperator {
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// Note: These are in order of highest-to-lowest operator precedence.
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Concatenate,
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Multiplication,
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Division,
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Modulo,
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Plus,
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Minus,
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ShiftLeft,
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ShiftRight,
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BitwiseAnd,
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BitwiseOr,
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LessThan,
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LessThanEquals,
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GreaterThan,
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GreaterThanEquals,
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Equals,
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NotEquals,
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And,
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Or,
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};
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class BinaryOperatorExpression : public NestedDoubleExpression {
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public:
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BinaryOperatorExpression(BinaryOperator type, NonnullRefPtr<Expression> lhs, NonnullRefPtr<Expression> rhs)
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: NestedDoubleExpression(move(lhs), move(rhs))
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, m_type(type)
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{
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}
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BinaryOperator type() const { return m_type; }
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private:
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BinaryOperator m_type;
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};
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class ChainedExpression : public Expression {
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public:
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explicit ChainedExpression(NonnullRefPtrVector<Expression> expressions)
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: m_expressions(move(expressions))
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{
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}
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const NonnullRefPtrVector<Expression>& expressions() const { return m_expressions; }
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private:
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NonnullRefPtrVector<Expression> m_expressions;
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};
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class CastExpression : public NestedExpression {
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public:
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CastExpression(NonnullRefPtr<Expression> expression, NonnullRefPtr<TypeName> type_name)
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: NestedExpression(move(expression))
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, m_type_name(move(type_name))
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{
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}
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const NonnullRefPtr<TypeName>& type_name() const { return m_type_name; }
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private:
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NonnullRefPtr<TypeName> m_type_name;
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};
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class CaseExpression : public Expression {
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public:
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struct WhenThenClause {
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NonnullRefPtr<Expression> when;
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NonnullRefPtr<Expression> then;
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};
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CaseExpression(RefPtr<Expression> case_expression, Vector<WhenThenClause> when_then_clauses, RefPtr<Expression> else_expression)
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: m_case_expression(case_expression)
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, m_when_then_clauses(when_then_clauses)
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, m_else_expression(else_expression)
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{
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VERIFY(!m_when_then_clauses.is_empty());
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}
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const RefPtr<Expression>& case_expression() const { return m_case_expression; }
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const Vector<WhenThenClause>& when_then_clauses() const { return m_when_then_clauses; }
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const RefPtr<Expression>& else_expression() const { return m_else_expression; }
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private:
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RefPtr<Expression> m_case_expression;
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Vector<WhenThenClause> m_when_then_clauses;
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RefPtr<Expression> m_else_expression;
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};
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class CollateExpression : public NestedExpression {
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public:
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CollateExpression(NonnullRefPtr<Expression> expression, String collation_name)
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: NestedExpression(move(expression))
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, m_collation_name(move(collation_name))
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{
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}
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const String& collation_name() const { return m_collation_name; }
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private:
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String m_collation_name;
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};
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enum class MatchOperator {
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Like,
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Glob,
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Match,
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Regexp,
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};
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class MatchExpression : public InvertibleNestedDoubleExpression {
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public:
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MatchExpression(MatchOperator type, NonnullRefPtr<Expression> lhs, NonnullRefPtr<Expression> rhs, RefPtr<Expression> escape, bool invert_expression)
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: InvertibleNestedDoubleExpression(move(lhs), move(rhs), invert_expression)
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, m_type(type)
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, m_escape(move(escape))
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{
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}
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MatchOperator type() const { return m_type; }
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const RefPtr<Expression>& escape() const { return m_escape; }
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private:
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MatchOperator m_type;
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RefPtr<Expression> m_escape;
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};
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class NullExpression : public InvertibleNestedExpression {
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public:
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NullExpression(NonnullRefPtr<Expression> expression, bool invert_expression)
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: InvertibleNestedExpression(move(expression), invert_expression)
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{
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}
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};
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class IsExpression : public InvertibleNestedDoubleExpression {
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public:
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IsExpression(NonnullRefPtr<Expression> lhs, NonnullRefPtr<Expression> rhs, bool invert_expression)
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: InvertibleNestedDoubleExpression(move(lhs), move(rhs), invert_expression)
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{
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}
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};
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class BetweenExpression : public InvertibleNestedDoubleExpression {
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public:
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BetweenExpression(NonnullRefPtr<Expression> expression, NonnullRefPtr<Expression> lhs, NonnullRefPtr<Expression> rhs, bool invert_expression)
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: InvertibleNestedDoubleExpression(move(lhs), move(rhs), invert_expression)
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, m_expression(move(expression))
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{
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}
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const NonnullRefPtr<Expression>& expression() const { return m_expression; }
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private:
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NonnullRefPtr<Expression> m_expression;
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};
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class InChainedExpression : public InvertibleNestedExpression {
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public:
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InChainedExpression(NonnullRefPtr<Expression> expression, NonnullRefPtr<ChainedExpression> expression_chain, bool invert_expression)
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: InvertibleNestedExpression(move(expression), invert_expression)
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, m_expression_chain(move(expression_chain))
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{
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}
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const NonnullRefPtr<ChainedExpression>& expression_chain() const { return m_expression_chain; }
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private:
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NonnullRefPtr<ChainedExpression> m_expression_chain;
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};
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class InTableExpression : public InvertibleNestedExpression {
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public:
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InTableExpression(NonnullRefPtr<Expression> expression, String schema_name, String table_name, bool invert_expression)
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: InvertibleNestedExpression(move(expression), invert_expression)
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, m_schema_name(move(schema_name))
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, m_table_name(move(table_name))
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{
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}
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const String& schema_name() const { return m_schema_name; }
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const String& table_name() const { return m_table_name; }
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private:
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String m_schema_name;
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String m_table_name;
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};
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//==================================================================================================
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// Statements
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//==================================================================================================
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class Statement : public ASTNode {
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};
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class ErrorStatement final : public Statement {
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};
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class CreateTable : public Statement {
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public:
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CreateTable(String schema_name, String table_name, NonnullRefPtrVector<ColumnDefinition> columns, bool is_temporary, bool is_error_if_table_exists)
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@ -28,14 +28,37 @@
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namespace SQL {
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class ASTNode;
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class BetweenExpression;
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class BinaryOperatorExpression;
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class BlobLiteral;
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class CaseExpression;
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class CastExpression;
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class ChainedExpression;
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class CollateExpression;
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class ColumnDefinition;
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class ColumnNameExpression;
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class CreateTable;
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class DropTable;
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class ErrorExpression;
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class ErrorStatement;
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class Expression;
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class InChainedExpression;
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class InTableExpression;
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class InvertibleNestedDoubleExpression;
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class InvertibleNestedExpression;
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class IsExpression;
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class Lexer;
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class MatchExpression;
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class NestedDoubleExpression;
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class NestedExpression;
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class NullExpression;
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class NullLiteral;
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class NumericLiteral;
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class Parser;
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class SignedNumber;
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class Statement;
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class StringLiteral;
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class Token;
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class TypeName;
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class UnaryOperatorExpression;
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}
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@ -25,6 +25,7 @@
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*/
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#include "Parser.h"
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#include <AK/TypeCasts.h>
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namespace SQL {
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@ -124,6 +125,449 @@ NonnullRefPtr<DropTable> Parser::parse_drop_table_statement()
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return create_ast_node<DropTable>(move(schema_name), move(table_name), is_error_if_table_does_not_exist);
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}
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NonnullRefPtr<Expression> Parser::parse_expression()
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{
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// https://sqlite.org/lang_expr.html
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auto expression = parse_primary_expression();
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if (match_secondary_expression())
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expression = parse_secondary_expression(move(expression));
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// FIXME: Parse 'bind-parameter'.
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// FIXME: Parse 'function-name'.
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// FIXME: Parse 'exists'.
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// FIXME: Parse 'raise-function'.
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return expression;
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}
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NonnullRefPtr<Expression> Parser::parse_primary_expression()
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{
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if (auto expression = parse_literal_value_expression(); expression.has_value())
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return move(expression.value());
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if (auto expression = parse_column_name_expression(); expression.has_value())
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return move(expression.value());
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if (auto expression = parse_unary_operator_expression(); expression.has_value())
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return move(expression.value());
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if (auto expression = parse_chained_expression(); expression.has_value())
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return move(expression.value());
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if (auto expression = parse_cast_expression(); expression.has_value())
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return move(expression.value());
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if (auto expression = parse_case_expression(); expression.has_value())
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return move(expression.value());
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expected("Primary Expression");
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consume();
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return create_ast_node<ErrorExpression>();
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}
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NonnullRefPtr<Expression> Parser::parse_secondary_expression(NonnullRefPtr<Expression> primary)
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{
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if (auto expression = parse_binary_operator_expression(primary); expression.has_value())
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return move(expression.value());
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if (auto expression = parse_collate_expression(primary); expression.has_value())
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return move(expression.value());
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if (auto expression = parse_is_expression(primary); expression.has_value())
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return move(expression.value());
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bool invert_expression = false;
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if (consume_if(TokenType::Not))
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invert_expression = true;
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if (auto expression = parse_match_expression(primary, invert_expression); expression.has_value())
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return move(expression.value());
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if (auto expression = parse_null_expression(primary, invert_expression); expression.has_value())
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return move(expression.value());
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if (auto expression = parse_between_expression(primary, invert_expression); expression.has_value())
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return move(expression.value());
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if (auto expression = parse_in_expression(primary, invert_expression); expression.has_value())
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return move(expression.value());
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expected("Secondary Expression");
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consume();
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return create_ast_node<ErrorExpression>();
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}
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bool Parser::match_secondary_expression() const
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{
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return match(TokenType::Not)
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|| match(TokenType::DoublePipe)
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|| match(TokenType::Asterisk)
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|| match(TokenType::Divide)
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|| match(TokenType::Modulus)
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|| match(TokenType::Plus)
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|| match(TokenType::Minus)
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|| match(TokenType::ShiftLeft)
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|| match(TokenType::ShiftRight)
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|| match(TokenType::Ampersand)
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|| match(TokenType::Pipe)
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|| match(TokenType::LessThan)
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|| match(TokenType::LessThanEquals)
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|| match(TokenType::GreaterThan)
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|| match(TokenType::GreaterThanEquals)
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|| match(TokenType::Equals)
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|| match(TokenType::EqualsEquals)
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|| match(TokenType::NotEquals1)
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|| match(TokenType::NotEquals2)
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|| match(TokenType::And)
|
||||
|| match(TokenType::Or)
|
||||
|| match(TokenType::Collate)
|
||||
|| match(TokenType::Is)
|
||||
|| match(TokenType::Like)
|
||||
|| match(TokenType::Glob)
|
||||
|| match(TokenType::Match)
|
||||
|| match(TokenType::Regexp)
|
||||
|| match(TokenType::Isnull)
|
||||
|| match(TokenType::Notnull)
|
||||
|| match(TokenType::Between)
|
||||
|| match(TokenType::In);
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_literal_value_expression()
|
||||
{
|
||||
if (match(TokenType::NumericLiteral)) {
|
||||
auto value = consume().double_value();
|
||||
return create_ast_node<NumericLiteral>(value);
|
||||
}
|
||||
if (match(TokenType::StringLiteral)) {
|
||||
// TODO: Should the surrounding ' ' be removed here?
|
||||
auto value = consume().value();
|
||||
return create_ast_node<StringLiteral>(value);
|
||||
}
|
||||
if (match(TokenType::BlobLiteral)) {
|
||||
// TODO: Should the surrounding x' ' be removed here?
|
||||
auto value = consume().value();
|
||||
return create_ast_node<BlobLiteral>(value);
|
||||
}
|
||||
if (consume_if(TokenType::Null))
|
||||
return create_ast_node<NullLiteral>();
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_column_name_expression()
|
||||
{
|
||||
if (!match(TokenType::Identifier))
|
||||
return {};
|
||||
|
||||
String first_identifier = consume(TokenType::Identifier).value();
|
||||
String schema_name;
|
||||
String table_name;
|
||||
String column_name;
|
||||
|
||||
if (consume_if(TokenType::Period)) {
|
||||
String second_identifier = consume(TokenType::Identifier).value();
|
||||
|
||||
if (consume_if(TokenType::Period)) {
|
||||
schema_name = move(first_identifier);
|
||||
table_name = move(second_identifier);
|
||||
column_name = consume(TokenType::Identifier).value();
|
||||
} else {
|
||||
table_name = move(first_identifier);
|
||||
column_name = move(second_identifier);
|
||||
}
|
||||
} else {
|
||||
column_name = move(first_identifier);
|
||||
}
|
||||
|
||||
return create_ast_node<ColumnNameExpression>(move(schema_name), move(table_name), move(column_name));
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_unary_operator_expression()
|
||||
{
|
||||
if (consume_if(TokenType::Minus))
|
||||
return create_ast_node<UnaryOperatorExpression>(UnaryOperator::Minus, parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Plus))
|
||||
return create_ast_node<UnaryOperatorExpression>(UnaryOperator::Plus, parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Tilde))
|
||||
return create_ast_node<UnaryOperatorExpression>(UnaryOperator::BitwiseNot, parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Not))
|
||||
return create_ast_node<UnaryOperatorExpression>(UnaryOperator::Not, parse_expression());
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_binary_operator_expression(NonnullRefPtr<Expression> lhs)
|
||||
{
|
||||
if (consume_if(TokenType::DoublePipe))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::Concatenate, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Asterisk))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::Multiplication, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Divide))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::Division, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Modulus))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::Modulo, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Plus))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::Plus, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Minus))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::Minus, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::ShiftLeft))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::ShiftLeft, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::ShiftRight))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::ShiftRight, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Ampersand))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::BitwiseAnd, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Pipe))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::BitwiseOr, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::LessThan))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::LessThan, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::LessThanEquals))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::LessThanEquals, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::GreaterThan))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::GreaterThan, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::GreaterThanEquals))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::GreaterThanEquals, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Equals) || consume_if(TokenType::EqualsEquals))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::Equals, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::NotEquals1) || consume_if(TokenType::NotEquals2))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::NotEquals, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::And))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::And, move(lhs), parse_expression());
|
||||
|
||||
if (consume_if(TokenType::Or))
|
||||
return create_ast_node<BinaryOperatorExpression>(BinaryOperator::Or, move(lhs), parse_expression());
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_chained_expression()
|
||||
{
|
||||
if (!match(TokenType::ParenOpen))
|
||||
return {};
|
||||
|
||||
NonnullRefPtrVector<Expression> expressions;
|
||||
consume(TokenType::ParenOpen);
|
||||
|
||||
do {
|
||||
expressions.append(parse_expression());
|
||||
if (match(TokenType::ParenClose))
|
||||
break;
|
||||
|
||||
consume(TokenType::Comma);
|
||||
} while (!match(TokenType::Eof));
|
||||
|
||||
consume(TokenType::ParenClose);
|
||||
|
||||
return create_ast_node<ChainedExpression>(move(expressions));
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_cast_expression()
|
||||
{
|
||||
if (!match(TokenType::Cast))
|
||||
return {};
|
||||
|
||||
consume(TokenType::Cast);
|
||||
consume(TokenType::ParenOpen);
|
||||
auto expression = parse_expression();
|
||||
consume(TokenType::As);
|
||||
auto type_name = parse_type_name();
|
||||
consume(TokenType::ParenClose);
|
||||
|
||||
return create_ast_node<CastExpression>(move(expression), move(type_name));
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_case_expression()
|
||||
{
|
||||
if (!match(TokenType::Case))
|
||||
return {};
|
||||
|
||||
consume();
|
||||
|
||||
RefPtr<Expression> case_expression;
|
||||
if (!match(TokenType::When)) {
|
||||
case_expression = parse_expression();
|
||||
}
|
||||
|
||||
Vector<CaseExpression::WhenThenClause> when_then_clauses;
|
||||
|
||||
do {
|
||||
consume(TokenType::When);
|
||||
auto when = parse_expression();
|
||||
consume(TokenType::Then);
|
||||
auto then = parse_expression();
|
||||
|
||||
when_then_clauses.append({ move(when), move(then) });
|
||||
|
||||
if (!match(TokenType::When))
|
||||
break;
|
||||
} while (!match(TokenType::Eof));
|
||||
|
||||
RefPtr<Expression> else_expression;
|
||||
if (consume_if(TokenType::Else))
|
||||
else_expression = parse_expression();
|
||||
|
||||
consume(TokenType::End);
|
||||
return create_ast_node<CaseExpression>(move(case_expression), move(when_then_clauses), move(else_expression));
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_collate_expression(NonnullRefPtr<Expression> expression)
|
||||
{
|
||||
if (!match(TokenType::Collate))
|
||||
return {};
|
||||
|
||||
consume();
|
||||
String collation_name = consume(TokenType::Identifier).value();
|
||||
|
||||
return create_ast_node<CollateExpression>(move(expression), move(collation_name));
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_is_expression(NonnullRefPtr<Expression> expression)
|
||||
{
|
||||
if (!match(TokenType::Is))
|
||||
return {};
|
||||
|
||||
consume();
|
||||
|
||||
bool invert_expression = false;
|
||||
if (match(TokenType::Not)) {
|
||||
consume();
|
||||
invert_expression = true;
|
||||
}
|
||||
|
||||
auto rhs = parse_expression();
|
||||
return create_ast_node<IsExpression>(move(expression), move(rhs), invert_expression);
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_match_expression(NonnullRefPtr<Expression> lhs, bool invert_expression)
|
||||
{
|
||||
auto parse_escape = [this]() {
|
||||
RefPtr<Expression> escape;
|
||||
if (consume_if(TokenType::Escape))
|
||||
escape = parse_expression();
|
||||
return escape;
|
||||
};
|
||||
|
||||
if (consume_if(TokenType::Like))
|
||||
return create_ast_node<MatchExpression>(MatchOperator::Like, move(lhs), parse_expression(), parse_escape(), invert_expression);
|
||||
|
||||
if (consume_if(TokenType::Glob))
|
||||
return create_ast_node<MatchExpression>(MatchOperator::Glob, move(lhs), parse_expression(), parse_escape(), invert_expression);
|
||||
|
||||
if (consume_if(TokenType::Match))
|
||||
return create_ast_node<MatchExpression>(MatchOperator::Match, move(lhs), parse_expression(), parse_escape(), invert_expression);
|
||||
|
||||
if (consume_if(TokenType::Regexp))
|
||||
return create_ast_node<MatchExpression>(MatchOperator::Regexp, move(lhs), parse_expression(), parse_escape(), invert_expression);
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_null_expression(NonnullRefPtr<Expression> expression, bool invert_expression)
|
||||
{
|
||||
if (!match(TokenType::Isnull) && !match(TokenType::Notnull) && !(invert_expression && match(TokenType::Null)))
|
||||
return {};
|
||||
|
||||
auto type = consume().type();
|
||||
invert_expression |= (type == TokenType::Notnull);
|
||||
|
||||
return create_ast_node<NullExpression>(move(expression), invert_expression);
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_between_expression(NonnullRefPtr<Expression> expression, bool invert_expression)
|
||||
{
|
||||
if (!match(TokenType::Between))
|
||||
return {};
|
||||
|
||||
consume();
|
||||
|
||||
auto nested = parse_expression();
|
||||
if (!is<BinaryOperatorExpression>(*nested)) {
|
||||
expected("Binary Expression");
|
||||
return create_ast_node<ErrorExpression>();
|
||||
}
|
||||
|
||||
const auto& binary_expression = static_cast<const BinaryOperatorExpression&>(*nested);
|
||||
if (binary_expression.type() != BinaryOperator::And) {
|
||||
expected("AND Expression");
|
||||
return create_ast_node<ErrorExpression>();
|
||||
}
|
||||
|
||||
return create_ast_node<BetweenExpression>(move(expression), binary_expression.lhs(), binary_expression.rhs(), invert_expression);
|
||||
}
|
||||
|
||||
Optional<NonnullRefPtr<Expression>> Parser::parse_in_expression(NonnullRefPtr<Expression> expression, bool invert_expression)
|
||||
{
|
||||
if (!match(TokenType::In))
|
||||
return {};
|
||||
|
||||
consume();
|
||||
|
||||
if (consume_if(TokenType::ParenOpen)) {
|
||||
if (match(TokenType::Select)) {
|
||||
// FIXME: Parse "select-stmt".
|
||||
return {};
|
||||
}
|
||||
|
||||
// FIXME: Consolidate this with parse_chained_expression(). That method consumes the opening paren as
|
||||
// well, and also requires at least one expression (whereas this allows for an empty chain).
|
||||
NonnullRefPtrVector<Expression> expressions;
|
||||
|
||||
if (!match(TokenType::ParenClose)) {
|
||||
do {
|
||||
expressions.append(parse_expression());
|
||||
if (match(TokenType::ParenClose))
|
||||
break;
|
||||
|
||||
consume(TokenType::Comma);
|
||||
} while (!match(TokenType::Eof));
|
||||
}
|
||||
|
||||
consume(TokenType::ParenClose);
|
||||
|
||||
auto chain = create_ast_node<ChainedExpression>(move(expressions));
|
||||
return create_ast_node<InChainedExpression>(move(expression), move(chain), invert_expression);
|
||||
}
|
||||
|
||||
String schema_or_table_name = consume(TokenType::Identifier).value();
|
||||
String schema_name;
|
||||
String table_name;
|
||||
|
||||
if (consume_if(TokenType::Period)) {
|
||||
schema_name = move(schema_or_table_name);
|
||||
table_name = consume(TokenType::Identifier).value();
|
||||
} else {
|
||||
table_name = move(schema_or_table_name);
|
||||
}
|
||||
|
||||
if (match(TokenType::ParenOpen)) {
|
||||
// FIXME: Parse "table-function".
|
||||
return {};
|
||||
}
|
||||
|
||||
return create_ast_node<InTableExpression>(move(expression), move(schema_name), move(table_name), invert_expression);
|
||||
}
|
||||
|
||||
NonnullRefPtr<ColumnDefinition> Parser::parse_column_definition()
|
||||
{
|
||||
// https://sqlite.org/syntax/column-def.html
|
||||
|
|
|
|||
|
|
@ -58,6 +58,9 @@ public:
|
|||
bool has_errors() const { return m_parser_state.m_errors.size(); }
|
||||
const Vector<Error>& errors() const { return m_parser_state.m_errors; }
|
||||
|
||||
protected:
|
||||
NonnullRefPtr<Expression> parse_expression(); // Protected for unit testing.
|
||||
|
||||
private:
|
||||
struct ParserState {
|
||||
explicit ParserState(Lexer);
|
||||
|
|
@ -69,6 +72,24 @@ private:
|
|||
|
||||
NonnullRefPtr<CreateTable> parse_create_table_statement();
|
||||
NonnullRefPtr<DropTable> parse_drop_table_statement();
|
||||
|
||||
NonnullRefPtr<Expression> parse_primary_expression();
|
||||
NonnullRefPtr<Expression> parse_secondary_expression(NonnullRefPtr<Expression> primary);
|
||||
bool match_secondary_expression() const;
|
||||
Optional<NonnullRefPtr<Expression>> parse_literal_value_expression();
|
||||
Optional<NonnullRefPtr<Expression>> parse_column_name_expression();
|
||||
Optional<NonnullRefPtr<Expression>> parse_unary_operator_expression();
|
||||
Optional<NonnullRefPtr<Expression>> parse_binary_operator_expression(NonnullRefPtr<Expression> lhs);
|
||||
Optional<NonnullRefPtr<Expression>> parse_chained_expression();
|
||||
Optional<NonnullRefPtr<Expression>> parse_cast_expression();
|
||||
Optional<NonnullRefPtr<Expression>> parse_case_expression();
|
||||
Optional<NonnullRefPtr<Expression>> parse_collate_expression(NonnullRefPtr<Expression> expression);
|
||||
Optional<NonnullRefPtr<Expression>> parse_is_expression(NonnullRefPtr<Expression> expression);
|
||||
Optional<NonnullRefPtr<Expression>> parse_match_expression(NonnullRefPtr<Expression> lhs, bool invert_expression);
|
||||
Optional<NonnullRefPtr<Expression>> parse_null_expression(NonnullRefPtr<Expression> expression, bool invert_expression);
|
||||
Optional<NonnullRefPtr<Expression>> parse_between_expression(NonnullRefPtr<Expression> expression, bool invert_expression);
|
||||
Optional<NonnullRefPtr<Expression>> parse_in_expression(NonnullRefPtr<Expression> expression, bool invert_expression);
|
||||
|
||||
NonnullRefPtr<ColumnDefinition> parse_column_definition();
|
||||
NonnullRefPtr<TypeName> parse_type_name();
|
||||
NonnullRefPtr<SignedNumber> parse_signed_number();
|
||||
|
|
|
|||
570
Userland/Libraries/LibSQL/Tests/TestSqlExpressionParser.cpp
Normal file
570
Userland/Libraries/LibSQL/Tests/TestSqlExpressionParser.cpp
Normal file
|
|
@ -0,0 +1,570 @@
|
|||
/*
|
||||
* Copyright (c) 2021, Tim Flynn <trflynn89@pm.me>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice, this
|
||||
* list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <AK/TestSuite.h>
|
||||
|
||||
#include <AK/HashMap.h>
|
||||
#include <AK/Result.h>
|
||||
#include <AK/String.h>
|
||||
#include <AK/StringBuilder.h>
|
||||
#include <AK/StringView.h>
|
||||
#include <AK/TypeCasts.h>
|
||||
#include <LibSQL/Lexer.h>
|
||||
#include <LibSQL/Parser.h>
|
||||
|
||||
namespace {
|
||||
|
||||
class ExpressionParser : public SQL::Parser {
|
||||
public:
|
||||
explicit ExpressionParser(SQL::Lexer lexer)
|
||||
: SQL::Parser(move(lexer))
|
||||
{
|
||||
}
|
||||
|
||||
NonnullRefPtr<SQL::Expression> parse()
|
||||
{
|
||||
return SQL::Parser::parse_expression();
|
||||
}
|
||||
};
|
||||
|
||||
using ParseResult = AK::Result<NonnullRefPtr<SQL::Expression>, String>;
|
||||
|
||||
ParseResult parse(StringView sql)
|
||||
{
|
||||
auto parser = ExpressionParser(SQL::Lexer(sql));
|
||||
auto expression = parser.parse();
|
||||
|
||||
if (parser.has_errors()) {
|
||||
return parser.errors()[0].to_string();
|
||||
}
|
||||
|
||||
return expression;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
TEST_CASE(numeric_literal)
|
||||
{
|
||||
auto validate = [](StringView sql, double expected_value) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::NumericLiteral>(*expression));
|
||||
|
||||
const auto& literal = static_cast<const SQL::NumericLiteral&>(*expression);
|
||||
EXPECT_EQ(literal.value(), expected_value);
|
||||
};
|
||||
|
||||
validate("123", 123);
|
||||
validate("3.14", 3.14);
|
||||
validate("0xff", 255);
|
||||
validate("1e3", 1000);
|
||||
}
|
||||
|
||||
TEST_CASE(string_literal)
|
||||
{
|
||||
EXPECT(parse("'").is_error());
|
||||
EXPECT(parse("'unterminated").is_error());
|
||||
|
||||
auto validate = [](StringView sql, StringView expected_value) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::StringLiteral>(*expression));
|
||||
|
||||
const auto& literal = static_cast<const SQL::StringLiteral&>(*expression);
|
||||
EXPECT_EQ(literal.value(), expected_value);
|
||||
};
|
||||
|
||||
validate("''", "''");
|
||||
validate("'hello friends'", "'hello friends'");
|
||||
}
|
||||
|
||||
TEST_CASE(blob_literal)
|
||||
{
|
||||
EXPECT(parse("x'").is_error());
|
||||
EXPECT(parse("x'unterminated").is_error());
|
||||
|
||||
auto validate = [](StringView sql, StringView expected_value) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::BlobLiteral>(*expression));
|
||||
|
||||
const auto& literal = static_cast<const SQL::BlobLiteral&>(*expression);
|
||||
EXPECT_EQ(literal.value(), expected_value);
|
||||
};
|
||||
|
||||
validate("x''", "x''");
|
||||
validate("x'hello friends'", "x'hello friends'");
|
||||
}
|
||||
|
||||
TEST_CASE(null_literal)
|
||||
{
|
||||
auto validate = [](StringView sql) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::NullLiteral>(*expression));
|
||||
};
|
||||
|
||||
validate("NULL");
|
||||
}
|
||||
|
||||
TEST_CASE(column_name)
|
||||
{
|
||||
EXPECT(parse(".column").is_error());
|
||||
EXPECT(parse("table.").is_error());
|
||||
EXPECT(parse("schema.table.").is_error());
|
||||
|
||||
auto validate = [](StringView sql, StringView expected_schema, StringView expected_table, StringView expected_column) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::ColumnNameExpression>(*expression));
|
||||
|
||||
const auto& column = static_cast<const SQL::ColumnNameExpression&>(*expression);
|
||||
EXPECT_EQ(column.schema_name(), expected_schema);
|
||||
EXPECT_EQ(column.table_name(), expected_table);
|
||||
EXPECT_EQ(column.column_name(), expected_column);
|
||||
};
|
||||
|
||||
validate("column", {}, {}, "column");
|
||||
validate("table.column", {}, "table", "column");
|
||||
validate("schema.table.column", "schema", "table", "column");
|
||||
}
|
||||
|
||||
TEST_CASE(unary_operator)
|
||||
{
|
||||
EXPECT(parse("-").is_error());
|
||||
EXPECT(parse("--").is_error());
|
||||
EXPECT(parse("+").is_error());
|
||||
EXPECT(parse("++").is_error());
|
||||
EXPECT(parse("~").is_error());
|
||||
EXPECT(parse("~~").is_error());
|
||||
EXPECT(parse("NOT").is_error());
|
||||
|
||||
auto validate = [](StringView sql, SQL::UnaryOperator expected_operator) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::UnaryOperatorExpression>(*expression));
|
||||
|
||||
const auto& unary = static_cast<const SQL::UnaryOperatorExpression&>(*expression);
|
||||
EXPECT_EQ(unary.type(), expected_operator);
|
||||
|
||||
const auto& secondary_expression = unary.expression();
|
||||
EXPECT(!is<SQL::ErrorExpression>(*secondary_expression));
|
||||
};
|
||||
|
||||
validate("-15", SQL::UnaryOperator::Minus);
|
||||
validate("+15", SQL::UnaryOperator::Plus);
|
||||
validate("~15", SQL::UnaryOperator::BitwiseNot);
|
||||
validate("NOT 15", SQL::UnaryOperator::Not);
|
||||
}
|
||||
|
||||
TEST_CASE(binary_operator)
|
||||
{
|
||||
HashMap<StringView, SQL::BinaryOperator> operators {
|
||||
{ "||", SQL::BinaryOperator::Concatenate },
|
||||
{ "*", SQL::BinaryOperator::Multiplication },
|
||||
{ "/", SQL::BinaryOperator::Division },
|
||||
{ "%", SQL::BinaryOperator::Modulo },
|
||||
{ "+", SQL::BinaryOperator::Plus },
|
||||
{ "-", SQL::BinaryOperator::Minus },
|
||||
{ "<<", SQL::BinaryOperator::ShiftLeft },
|
||||
{ ">>", SQL::BinaryOperator::ShiftRight },
|
||||
{ "&", SQL::BinaryOperator::BitwiseAnd },
|
||||
{ "|", SQL::BinaryOperator::BitwiseOr },
|
||||
{ "<", SQL::BinaryOperator::LessThan },
|
||||
{ "<=", SQL::BinaryOperator::LessThanEquals },
|
||||
{ ">", SQL::BinaryOperator::GreaterThan },
|
||||
{ ">=", SQL::BinaryOperator::GreaterThanEquals },
|
||||
{ "=", SQL::BinaryOperator::Equals },
|
||||
{ "==", SQL::BinaryOperator::Equals },
|
||||
{ "!=", SQL::BinaryOperator::NotEquals },
|
||||
{ "<>", SQL::BinaryOperator::NotEquals },
|
||||
{ "AND", SQL::BinaryOperator::And },
|
||||
{ "OR", SQL::BinaryOperator::Or },
|
||||
};
|
||||
|
||||
for (auto op : operators) {
|
||||
EXPECT(parse(op.key).is_error());
|
||||
|
||||
StringBuilder builder;
|
||||
builder.append("1 ");
|
||||
builder.append(op.key);
|
||||
EXPECT(parse(builder.build()).is_error());
|
||||
|
||||
builder.clear();
|
||||
|
||||
if (op.key != "+" && op.key != "-") { // "+1" and "-1" are fine (unary operator).
|
||||
builder.append(op.key);
|
||||
builder.append(" 1");
|
||||
EXPECT(parse(builder.build()).is_error());
|
||||
}
|
||||
}
|
||||
|
||||
auto validate = [](StringView sql, SQL::BinaryOperator expected_operator) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::BinaryOperatorExpression>(*expression));
|
||||
|
||||
const auto& binary = static_cast<const SQL::BinaryOperatorExpression&>(*expression);
|
||||
EXPECT(!is<SQL::ErrorExpression>(*binary.lhs()));
|
||||
EXPECT(!is<SQL::ErrorExpression>(*binary.rhs()));
|
||||
EXPECT_EQ(binary.type(), expected_operator);
|
||||
};
|
||||
|
||||
for (auto op : operators) {
|
||||
StringBuilder builder;
|
||||
builder.append("1 ");
|
||||
builder.append(op.key);
|
||||
builder.append(" 1");
|
||||
validate(builder.build(), op.value);
|
||||
}
|
||||
}
|
||||
|
||||
TEST_CASE(chained_expression)
|
||||
{
|
||||
EXPECT(parse("()").is_error());
|
||||
EXPECT(parse("(,)").is_error());
|
||||
EXPECT(parse("(15,)").is_error());
|
||||
|
||||
auto validate = [](StringView sql, size_t expected_chain_size) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::ChainedExpression>(*expression));
|
||||
|
||||
const auto& chain = static_cast<const SQL::ChainedExpression&>(*expression).expressions();
|
||||
EXPECT_EQ(chain.size(), expected_chain_size);
|
||||
|
||||
for (const auto& chained_expression : chain)
|
||||
EXPECT(!is<SQL::ErrorExpression>(chained_expression));
|
||||
};
|
||||
|
||||
validate("(15)", 1);
|
||||
validate("(15, 16)", 2);
|
||||
validate("(15, 16, column)", 3);
|
||||
}
|
||||
|
||||
TEST_CASE(cast_expression)
|
||||
{
|
||||
EXPECT(parse("CAST").is_error());
|
||||
EXPECT(parse("CAST (").is_error());
|
||||
EXPECT(parse("CAST ()").is_error());
|
||||
EXPECT(parse("CAST (15)").is_error());
|
||||
EXPECT(parse("CAST (15 AS").is_error());
|
||||
EXPECT(parse("CAST (15 AS)").is_error());
|
||||
EXPECT(parse("CAST (15 AS int").is_error());
|
||||
|
||||
auto validate = [](StringView sql, StringView expected_type_name) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::CastExpression>(*expression));
|
||||
|
||||
const auto& cast = static_cast<const SQL::CastExpression&>(*expression);
|
||||
EXPECT(!is<SQL::ErrorExpression>(*cast.expression()));
|
||||
|
||||
const auto& type_name = cast.type_name();
|
||||
EXPECT_EQ(type_name->name(), expected_type_name);
|
||||
};
|
||||
|
||||
validate("CAST (15 AS int)", "int");
|
||||
validate("CAST ('NULL' AS null)", "null");
|
||||
validate("CAST (15 AS varchar(255))", "varchar");
|
||||
}
|
||||
|
||||
TEST_CASE(case_expression)
|
||||
{
|
||||
EXPECT(parse("CASE").is_error());
|
||||
EXPECT(parse("CASE END").is_error());
|
||||
EXPECT(parse("CASE 15").is_error());
|
||||
EXPECT(parse("CASE 15 END").is_error());
|
||||
EXPECT(parse("CASE WHEN").is_error());
|
||||
EXPECT(parse("CASE WHEN THEN").is_error());
|
||||
EXPECT(parse("CASE WHEN 15 THEN 16").is_error());
|
||||
EXPECT(parse("CASE WHEN 15 THEN 16 ELSE").is_error());
|
||||
EXPECT(parse("CASE WHEN 15 THEN 16 ELSE END").is_error());
|
||||
|
||||
auto validate = [](StringView sql, bool expect_case_expression, size_t expected_when_then_size, bool expect_else_expression) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::CaseExpression>(*expression));
|
||||
|
||||
const auto& case_ = static_cast<const SQL::CaseExpression&>(*expression);
|
||||
|
||||
const auto& case_expression = case_.case_expression();
|
||||
EXPECT_EQ(case_expression.is_null(), !expect_case_expression);
|
||||
if (case_expression)
|
||||
EXPECT(!is<SQL::ErrorExpression>(*case_expression));
|
||||
|
||||
const auto& when_then_clauses = case_.when_then_clauses();
|
||||
EXPECT_EQ(when_then_clauses.size(), expected_when_then_size);
|
||||
for (const auto& when_then_clause : when_then_clauses) {
|
||||
EXPECT(!is<SQL::ErrorExpression>(*when_then_clause.when));
|
||||
EXPECT(!is<SQL::ErrorExpression>(*when_then_clause.then));
|
||||
}
|
||||
|
||||
const auto& else_expression = case_.else_expression();
|
||||
EXPECT_EQ(else_expression.is_null(), !expect_else_expression);
|
||||
if (else_expression)
|
||||
EXPECT(!is<SQL::ErrorExpression>(*else_expression));
|
||||
};
|
||||
|
||||
validate("CASE WHEN 16 THEN 17 END", false, 1, false);
|
||||
validate("CASE WHEN 16 THEN 17 WHEN 18 THEN 19 END", false, 2, false);
|
||||
validate("CASE WHEN 16 THEN 17 WHEN 18 THEN 19 ELSE 20 END", false, 2, true);
|
||||
|
||||
validate("CASE 15 WHEN 16 THEN 17 END", true, 1, false);
|
||||
validate("CASE 15 WHEN 16 THEN 17 WHEN 18 THEN 19 END", true, 2, false);
|
||||
validate("CASE 15 WHEN 16 THEN 17 WHEN 18 THEN 19 ELSE 20 END", true, 2, true);
|
||||
}
|
||||
|
||||
TEST_CASE(collate_expression)
|
||||
{
|
||||
EXPECT(parse("COLLATE").is_error());
|
||||
EXPECT(parse("COLLATE name").is_error());
|
||||
EXPECT(parse("15 COLLATE").is_error());
|
||||
|
||||
auto validate = [](StringView sql, StringView expected_collation_name) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::CollateExpression>(*expression));
|
||||
|
||||
const auto& collate = static_cast<const SQL::CollateExpression&>(*expression);
|
||||
EXPECT(!is<SQL::ErrorExpression>(*collate.expression()));
|
||||
EXPECT_EQ(collate.collation_name(), expected_collation_name);
|
||||
};
|
||||
|
||||
validate("15 COLLATE fifteen", "fifteen");
|
||||
validate("(15, 16) COLLATE chain", "chain");
|
||||
}
|
||||
|
||||
TEST_CASE(is_expression)
|
||||
{
|
||||
EXPECT(parse("IS").is_error());
|
||||
EXPECT(parse("IS 1").is_error());
|
||||
EXPECT(parse("1 IS").is_error());
|
||||
EXPECT(parse("IS NOT").is_error());
|
||||
EXPECT(parse("IS NOT 1").is_error());
|
||||
EXPECT(parse("1 IS NOT").is_error());
|
||||
|
||||
auto validate = [](StringView sql, bool expected_invert_expression) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::IsExpression>(*expression));
|
||||
|
||||
const auto& is_ = static_cast<const SQL::IsExpression&>(*expression);
|
||||
EXPECT(!is<SQL::ErrorExpression>(*is_.lhs()));
|
||||
EXPECT(!is<SQL::ErrorExpression>(*is_.rhs()));
|
||||
EXPECT_EQ(is_.invert_expression(), expected_invert_expression);
|
||||
};
|
||||
|
||||
validate("1 IS NULL", false);
|
||||
validate("1 IS NOT NULL", true);
|
||||
}
|
||||
|
||||
TEST_CASE(match_expression)
|
||||
{
|
||||
HashMap<StringView, SQL::MatchOperator> operators {
|
||||
{ "LIKE", SQL::MatchOperator::Like },
|
||||
{ "GLOB", SQL::MatchOperator::Glob },
|
||||
{ "MATCH", SQL::MatchOperator::Match },
|
||||
{ "REGEXP", SQL::MatchOperator::Regexp },
|
||||
};
|
||||
|
||||
for (auto op : operators) {
|
||||
EXPECT(parse(op.key).is_error());
|
||||
|
||||
StringBuilder builder;
|
||||
builder.append("1 ");
|
||||
builder.append(op.key);
|
||||
EXPECT(parse(builder.build()).is_error());
|
||||
|
||||
builder.clear();
|
||||
builder.append(op.key);
|
||||
builder.append(" 1");
|
||||
EXPECT(parse(builder.build()).is_error());
|
||||
}
|
||||
|
||||
auto validate = [](StringView sql, SQL::MatchOperator expected_operator, bool expected_invert_expression) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::MatchExpression>(*expression));
|
||||
|
||||
const auto& match = static_cast<const SQL::MatchExpression&>(*expression);
|
||||
EXPECT(!is<SQL::ErrorExpression>(*match.lhs()));
|
||||
EXPECT(!is<SQL::ErrorExpression>(*match.rhs()));
|
||||
EXPECT_EQ(match.type(), expected_operator);
|
||||
EXPECT_EQ(match.invert_expression(), expected_invert_expression);
|
||||
};
|
||||
|
||||
for (auto op : operators) {
|
||||
StringBuilder builder;
|
||||
builder.append("1 ");
|
||||
builder.append(op.key);
|
||||
builder.append(" 1");
|
||||
validate(builder.build(), op.value, false);
|
||||
|
||||
builder.clear();
|
||||
builder.append("1 NOT ");
|
||||
builder.append(op.key);
|
||||
builder.append(" 1");
|
||||
validate(builder.build(), op.value, true);
|
||||
}
|
||||
}
|
||||
|
||||
TEST_CASE(null_expression)
|
||||
{
|
||||
EXPECT(parse("ISNULL").is_error());
|
||||
EXPECT(parse("NOTNULL").is_error());
|
||||
EXPECT(parse("15 NOT").is_error());
|
||||
|
||||
auto validate = [](StringView sql, bool expected_invert_expression) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::NullExpression>(*expression));
|
||||
|
||||
const auto& null = static_cast<const SQL::NullExpression&>(*expression);
|
||||
EXPECT_EQ(null.invert_expression(), expected_invert_expression);
|
||||
};
|
||||
|
||||
validate("15 ISNULL", false);
|
||||
validate("15 NOTNULL", true);
|
||||
validate("15 NOT NULL", true);
|
||||
}
|
||||
|
||||
TEST_CASE(between_expression)
|
||||
{
|
||||
EXPECT(parse("BETWEEN").is_error());
|
||||
EXPECT(parse("NOT BETWEEN").is_error());
|
||||
EXPECT(parse("BETWEEN 10 AND 20").is_error());
|
||||
EXPECT(parse("NOT BETWEEN 10 AND 20").is_error());
|
||||
EXPECT(parse("15 BETWEEN 10").is_error());
|
||||
EXPECT(parse("15 BETWEEN 10 AND").is_error());
|
||||
EXPECT(parse("15 BETWEEN AND 20").is_error());
|
||||
EXPECT(parse("15 BETWEEN 10 OR 20").is_error());
|
||||
|
||||
auto validate = [](StringView sql, bool expected_invert_expression) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::BetweenExpression>(*expression));
|
||||
|
||||
const auto& between = static_cast<const SQL::BetweenExpression&>(*expression);
|
||||
EXPECT(!is<SQL::ErrorExpression>(*between.expression()));
|
||||
EXPECT(!is<SQL::ErrorExpression>(*between.lhs()));
|
||||
EXPECT(!is<SQL::ErrorExpression>(*between.rhs()));
|
||||
EXPECT_EQ(between.invert_expression(), expected_invert_expression);
|
||||
};
|
||||
|
||||
validate("15 BETWEEN 10 AND 20", false);
|
||||
validate("15 NOT BETWEEN 10 AND 20", true);
|
||||
}
|
||||
|
||||
TEST_CASE(in_table_expression)
|
||||
{
|
||||
EXPECT(parse("IN").is_error());
|
||||
EXPECT(parse("IN table").is_error());
|
||||
EXPECT(parse("NOT IN").is_error());
|
||||
EXPECT(parse("NOT IN table").is_error());
|
||||
|
||||
auto validate = [](StringView sql, StringView expected_schema, StringView expected_table, bool expected_invert_expression) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::InTableExpression>(*expression));
|
||||
|
||||
const auto& in = static_cast<const SQL::InTableExpression&>(*expression);
|
||||
EXPECT(!is<SQL::ErrorExpression>(*in.expression()));
|
||||
EXPECT_EQ(in.schema_name(), expected_schema);
|
||||
EXPECT_EQ(in.table_name(), expected_table);
|
||||
EXPECT_EQ(in.invert_expression(), expected_invert_expression);
|
||||
};
|
||||
|
||||
validate("15 IN table", {}, "table", false);
|
||||
validate("15 IN schema.table", "schema", "table", false);
|
||||
|
||||
validate("15 NOT IN table", {}, "table", true);
|
||||
validate("15 NOT IN schema.table", "schema", "table", true);
|
||||
}
|
||||
|
||||
TEST_CASE(in_chained_expression)
|
||||
{
|
||||
EXPECT(parse("IN ()").is_error());
|
||||
EXPECT(parse("NOT IN ()").is_error());
|
||||
|
||||
auto validate = [](StringView sql, size_t expected_chain_size, bool expected_invert_expression) {
|
||||
auto result = parse(sql);
|
||||
EXPECT(!result.is_error());
|
||||
|
||||
auto expression = result.release_value();
|
||||
EXPECT(is<SQL::InChainedExpression>(*expression));
|
||||
|
||||
const auto& in = static_cast<const SQL::InChainedExpression&>(*expression);
|
||||
EXPECT(!is<SQL::ErrorExpression>(*in.expression()));
|
||||
EXPECT_EQ(in.expression_chain()->expressions().size(), expected_chain_size);
|
||||
EXPECT_EQ(in.invert_expression(), expected_invert_expression);
|
||||
|
||||
for (const auto& chained_expression : in.expression_chain()->expressions())
|
||||
EXPECT(!is<SQL::ErrorExpression>(chained_expression));
|
||||
};
|
||||
|
||||
validate("15 IN ()", 0, false);
|
||||
validate("15 IN (15)", 1, false);
|
||||
validate("15 IN (15, 16)", 2, false);
|
||||
|
||||
validate("15 NOT IN ()", 0, true);
|
||||
validate("15 NOT IN (15)", 1, true);
|
||||
validate("15 NOT IN (15, 16)", 2, true);
|
||||
}
|
||||
|
||||
TEST_MAIN(SqlExpressionParser)
|
||||
Loading…
Add table
Add a link
Reference in a new issue