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LibSQL: Implement LIKE SQL expressions

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Guilherme Gonçalves 2021-12-29 11:47:29 -03:00 • committed by Ali Mohammad Pur
parent e957c078d5
commit f91d471843
5 changed files with 133 additions and 1 deletions
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73
Tests/LibSQL/TestSqlStatementExecution.cpp
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@ -337,4 +337,77 @@ TEST_CASE(select_inner_join)
EXPECT_EQ(row[2].to_string(), "Test_12");
}
TEST_CASE(select_with_like)
{
ScopeGuard guard([]() { unlink(db_name); });
auto database = SQL::Database::construct(db_name);
EXPECT(!database->open().is_error());
create_table(database);
auto result = execute(database,
"INSERT INTO TestSchema.TestTable ( TextColumn, IntColumn ) VALUES "
"( 'Test+1', 42 ), "
"( 'Test+2', 43 ), "
"( 'Test+3', 44 ), "
"( 'Test+4', 45 ), "
"( 'Test+5', 46 ), "
"( 'Another+Test_6', 47 );");
EXPECT(result->error().code == SQL::SQLErrorCode::NoError);
EXPECT(result->inserted() == 6);
// Simple match
result = execute(database, "SELECT TextColumn FROM TestSchema.TestTable WHERE TextColumn LIKE 'Test+1';");
EXPECT(result->error().code == SQL::SQLErrorCode::NoError);
EXPECT(result->has_results());
EXPECT_EQ(result->results().size(), 1u);
// Use % to match most rows
result = execute(database, "SELECT TextColumn FROM TestSchema.TestTable WHERE TextColumn LIKE 'T%';");
EXPECT(result->error().code == SQL::SQLErrorCode::NoError);
EXPECT(result->has_results());
EXPECT_EQ(result->results().size(), 5u);
// Same as above but invert the match
result = execute(database, "SELECT TextColumn FROM TestSchema.TestTable WHERE TextColumn NOT LIKE 'T%';");
EXPECT(result->error().code == SQL::SQLErrorCode::NoError);
EXPECT(result->has_results());
EXPECT_EQ(result->results().size(), 1u);
// Use _ and % to match all rows
result = execute(database, "SELECT TextColumn FROM TestSchema.TestTable WHERE TextColumn LIKE '%e_t%';");
EXPECT(result->error().code == SQL::SQLErrorCode::NoError);
EXPECT(result->has_results());
EXPECT_EQ(result->results().size(), 6u);
// Use escape to match a single row. The escape character happens to be a
// Regex metacharacter, let's make sure we don't get confused by that.
result = execute(database, "SELECT TextColumn FROM TestSchema.TestTable WHERE TextColumn LIKE '%Test^_%' ESCAPE '^';");
EXPECT(result->error().code == SQL::SQLErrorCode::NoError);
EXPECT(result->has_results());
EXPECT_EQ(result->results().size(), 1u);
// Same as above but escape the escape character happens to be a SQL
// metacharacter - we want to make sure it's treated as an escape.
result = execute(database, "SELECT TextColumn FROM TestSchema.TestTable WHERE TextColumn LIKE '%Test__%' ESCAPE '_';");
EXPECT(result->error().code == SQL::SQLErrorCode::NoError);
EXPECT(result->has_results());
EXPECT_EQ(result->results().size(), 1u);
// (Unnecessarily) escaping a character that happens to be a Regex
// metacharacter should have no effect.
result = execute(database, "SELECT TextColumn FROM TestSchema.TestTable WHERE TextColumn LIKE 'Test:+_' ESCAPE ':';");
EXPECT(result->error().code == SQL::SQLErrorCode::NoError);
EXPECT(result->has_results());
EXPECT_EQ(result->results().size(), 5u);
// Make sure we error out if the ESCAPE is empty
result = execute(database, "SELECT TextColumn FROM TestSchema.TestTable WHERE TextColumn LIKE '%' ESCAPE '';");
EXPECT(result->error().code == SQL::SQLErrorCode::SyntaxError);
EXPECT(!result->has_results());
// Make sure we error out if the ESCAPE has more than a single character
result = execute(database, "SELECT TextColumn FROM TestSchema.TestTable WHERE TextColumn LIKE '%' ESCAPE 'whf';");
EXPECT(result->error().code == SQL::SQLErrorCode::SyntaxError);
EXPECT(!result->has_results());
}
}