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Add support for MSSQL IF/ELSE statements. (#1791)

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Co-authored-by: Roman Borschel <roman@cluvio.com>
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Roman Borschel 2025-04-06 07:09:24 +02:00 • committed by GitHub
parent 4deed26006
commit 0d2976d723
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6 changed files with 530 additions and 134 deletions
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108
tests/sqlparser_common.rs
View file

@ -14229,9 +14229,12 @@ fn parse_case_statement() {
};
assert_eq!(Some(Expr::value(number("1"))), stmt.match_expr);
assert_eq!(Expr::value(number("2")), stmt.when_blocks[0].condition);
assert_eq!(2, stmt.when_blocks[0].statements.len());
assert_eq!(1, stmt.else_block.unwrap().len());
assert_eq!(
Some(Expr::value(number("2"))),
stmt.when_blocks[0].condition
);
assert_eq!(2, stmt.when_blocks[0].statements().len());
assert_eq!(1, stmt.else_block.unwrap().statements().len());
verified_stmt(concat!(
"CASE 1",
@ -14274,17 +14277,35 @@ fn parse_case_statement() {
);
}
#[test]
fn test_case_statement_span() {
let sql = "CASE 1 WHEN 2 THEN SELECT 1; SELECT 2; ELSE SELECT 3; END CASE";
let mut parser = Parser::new(&GenericDialect {}).try_with_sql(sql).unwrap();
assert_eq!(
parser.parse_statement().unwrap().span(),
Span::new(Location::new(1, 1), Location::new(1, sql.len() as u64 + 1))
);
}
#[test]
fn parse_if_statement() {
let dialects = all_dialects_except(|d| d.is::<MsSqlDialect>());
let sql = "IF 1 THEN SELECT 1; ELSEIF 2 THEN SELECT 2; ELSE SELECT 3; END IF";
let Statement::If(stmt) = verified_stmt(sql) else {
let Statement::If(IfStatement {
if_block,
elseif_blocks,
else_block,
..
}) = dialects.verified_stmt(sql)
else {
unreachable!()
};
assert_eq!(Expr::value(number("1")), stmt.if_block.condition);
assert_eq!(Expr::value(number("2")), stmt.elseif_blocks[0].condition);
assert_eq!(1, stmt.else_block.unwrap().len());
assert_eq!(Some(Expr::value(number("1"))), if_block.condition);
assert_eq!(Some(Expr::value(number("2"))), elseif_blocks[0].condition);
assert_eq!(1, else_block.unwrap().statements().len());
verified_stmt(concat!(
dialects.verified_stmt(concat!(
"IF 1 THEN",
" SELECT 1;",
" SELECT 2;",
@ -14300,7 +14321,7 @@ fn parse_if_statement() {
" SELECT 9;",
" END IF"
));
verified_stmt(concat!(
dialects.verified_stmt(concat!(
"IF 1 THEN",
" SELECT 1;",
" SELECT 2;",
@ -14309,7 +14330,7 @@ fn parse_if_statement() {
" SELECT 4;",
" END IF"
));
verified_stmt(concat!(
dialects.verified_stmt(concat!(
"IF 1 THEN",
" SELECT 1;",
" SELECT 2;",
@ -14319,22 +14340,79 @@ fn parse_if_statement() {
" SELECT 4;",
" END IF"
));
verified_stmt(concat!("IF 1 THEN", " SELECT 1;", " SELECT 2;", " END IF"));
verified_stmt(concat!(
dialects.verified_stmt(concat!("IF 1 THEN", " SELECT 1;", " SELECT 2;", " END IF"));
dialects.verified_stmt(concat!(
"IF (1) THEN",
" SELECT 1;",
" SELECT 2;",
" END IF"
));
verified_stmt("IF 1 THEN END IF");
verified_stmt("IF 1 THEN SELECT 1; ELSEIF 1 THEN END IF");
dialects.verified_stmt("IF 1 THEN END IF");
dialects.verified_stmt("IF 1 THEN SELECT 1; ELSEIF 1 THEN END IF");
assert_eq!(
ParserError::ParserError("Expected: IF, found: EOF".to_string()),
parse_sql_statements("IF 1 THEN SELECT 1; ELSEIF 1 THEN SELECT 2; END").unwrap_err()
dialects
.parse_sql_statements("IF 1 THEN SELECT 1; ELSEIF 1 THEN SELECT 2; END")
.unwrap_err()
);
}
#[test]
fn test_if_statement_span() {
let sql = "IF 1=1 THEN SELECT 1; ELSEIF 1=2 THEN SELECT 2; ELSE SELECT 3; END IF";
let mut parser = Parser::new(&GenericDialect {}).try_with_sql(sql).unwrap();
assert_eq!(
parser.parse_statement().unwrap().span(),
Span::new(Location::new(1, 1), Location::new(1, sql.len() as u64 + 1))
);
}
#[test]
fn test_if_statement_multiline_span() {
let sql_line1 = "IF 1 = 1 THEN SELECT 1;";
let sql_line2 = "ELSEIF 1 = 2 THEN SELECT 2;";
let sql_line3 = "ELSE SELECT 3;";
let sql_line4 = "END IF";
let sql = [sql_line1, sql_line2, sql_line3, sql_line4].join("\n");
let mut parser = Parser::new(&GenericDialect {}).try_with_sql(&sql).unwrap();
assert_eq!(
parser.parse_statement().unwrap().span(),
Span::new(
Location::new(1, 1),
Location::new(4, sql_line4.len() as u64 + 1)
)
);
}
#[test]
fn test_conditional_statement_span() {
let sql = "IF 1=1 THEN SELECT 1; ELSEIF 1=2 THEN SELECT 2; ELSE SELECT 3; END IF";
let mut parser = Parser::new(&GenericDialect {}).try_with_sql(sql).unwrap();
match parser.parse_statement().unwrap() {
Statement::If(IfStatement {
if_block,
elseif_blocks,
else_block,
..
}) => {
assert_eq!(
Span::new(Location::new(1, 1), Location::new(1, 21)),
if_block.span()
);
assert_eq!(
Span::new(Location::new(1, 23), Location::new(1, 47)),
elseif_blocks[0].span()
);
assert_eq!(
Span::new(Location::new(1, 49), Location::new(1, 62)),
else_block.unwrap().span()
);
}
stmt => panic!("Unexpected statement: {:?}", stmt),
}
}
#[test]
fn parse_raise_statement() {
let sql = "RAISE USING MESSAGE = 42";