python/sqlglot
1
0
Fork 0
Code Issues Activity

Merging upstream version 16.4.0.

Browse source 
Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-13 20:04:59 +01:00
parent 8a4abed982
commit 71f21d9752
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
90 changed files with 35638 additions and 33343 deletions
Download patch file Download diff file Expand all files Collapse all files

25
sqlglot/optimizer/normalize_identifiers.py
View file

@ -1,12 +1,15 @@
from sqlglot import exp
from sqlglot._typing import E
from sqlglot.dialects.dialect import RESOLVES_IDENTIFIERS_AS_UPPERCASE, DialectType
from sqlglot.dialects.dialect import Dialect, DialectType
def normalize_identifiers(expression: E, dialect: DialectType = None) -> E:
"""
Normalize all unquoted identifiers to either lower or upper case, depending on
the dialect. This essentially makes those identifiers case-insensitive.
Normalize all unquoted identifiers to either lower or upper case, depending
on the dialect. This essentially makes those identifiers case-insensitive.
Note:
Some dialects (e.g. BigQuery) treat identifiers as case-insensitive even
when they're quoted, so in these cases all identifiers are normalized.
Example:
>>> import sqlglot
@ -21,16 +24,4 @@ def normalize_identifiers(expression: E, dialect: DialectType = None) -> E:
Returns:
The transformed expression.
"""
return expression.transform(_normalize, dialect, copy=False)
def _normalize(node: exp.Expression, dialect: DialectType = None) -> exp.Expression:
if isinstance(node, exp.Identifier) and not node.quoted:
node.set(
"this",
node.this.upper()
if dialect in RESOLVES_IDENTIFIERS_AS_UPPERCASE
else node.this.lower(),
)
return node
return expression.transform(Dialect.get_or_raise(dialect).normalize_identifier, copy=False)