feat: enable SQLGlot compiler as default

Author: chelsea-lin

bigframes/core/compile/__init__.py

@@ -15,7 +15,7 @@
 
 from bigframes.core.compile.api import test_only_ibis_inferred_schema
 from bigframes.core.compile.configs import CompileRequest, CompileResult
-from bigframes.core.compile.ibis_compiler.ibis_compiler import compile_sql
+from bigframes.core.compile.sqlglot.compiler import compile_sql
 
 __all__ = [
     "test_only_ibis_inferred_schema",

bigframes/session/direct_gbq_execution.py

@@ -20,7 +20,9 @@
 import google.cloud.bigquery.table as bq_table
 
 from bigframes.core import compile, nodes
-from bigframes.core.compile import sqlglot
+from bigframes.core.compile.ibis_compiler.ibis_compiler import (
+    compile_sql as compile_sql_ibis,
+)
 import bigframes.core.events
 from bigframes.session import executor, semi_executor
 import bigframes.session._io.bigquery as bq_io
@@ -40,7 +42,7 @@ def __init__(
     ):
         self.bqclient = bqclient
         self._compile_fn = (
-            compile.compile_sql if compiler == "ibis" else sqlglot.compile_sql
+            compile_sql_ibis if compiler == "ibis" else compile.compile_sql
         )
         self._publisher = publisher