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https://github.com/RGBCube/serenity
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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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