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from sqlglot import exp
def quote_identities(expression):
"""
Rewrite sqlglot AST to ensure all identities are quoted.
Example:
>>> import sqlglot
>>> expression = sqlglot.parse_one("SELECT x.a AS a FROM db.x")
>>> quote_identities(expression).sql()
'SELECT "x"."a" AS "a" FROM "db"."x"'
Args:
expression (sqlglot.Expression): expression to quote
Returns:
sqlglot.Expression: quoted expression
"""
def qualify(node):
if isinstance(node, exp.Identifier):
node.set("quoted", True)
return node
return expression.transform(qualify, copy=False)
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