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Merging upstream version 26.10.1.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-03-17 07:38:58 +01:00
parent f2e3d707cd
commit 273cfbc19c
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
66 changed files with 79349 additions and 76628 deletions
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10
sqlglot/optimizer/simplify.py
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@ -117,7 +117,7 @@ def simplify(
node = flatten(node)
node = simplify_connectors(node, root)
node = remove_complements(node, root)
node = simplify_coalesce(node)
node = simplify_coalesce(node, dialect)
node.parent = expression.parent
node = simplify_literals(node, root)
node = simplify_equality(node)
@ -775,7 +775,7 @@ def _is_constant(expression: exp.Expression) -> bool:
return isinstance(expression, exp.CONSTANTS) or _is_date_literal(expression)
def simplify_coalesce(expression):
def simplify_coalesce(expression: exp.Expression, dialect: DialectType) -> exp.Expression:
# COALESCE(x) -> x
if (
isinstance(expression, exp.Coalesce)
@ -785,6 +785,12 @@ def simplify_coalesce(expression):
):
return expression.this
# We can't convert `COALESCE(x, 1) = 2` into `NOT x IS NULL AND x = 2` for redshift,
# because they are not always equivalent. For example, if `x` is `NULL` and it comes
# from a table, then the result is `NULL`, despite `FALSE AND NULL` evaluating to `FALSE`
if dialect == "redshift":
return expression
if not isinstance(expression, COMPARISONS):
return expression