Fix parser/explain issues and enable 11 tests (#21) #22
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Parser changes: - Add Function field to DropQuery for DROP FUNCTION support - Track dropFunction flag in parseDrop() Explain output fixes: - Add explainRenameQuery for RENAME TABLE statements - Add DropFunctionQuery handling in explainDropQuery - Add database-qualified DROP TABLE format (db.table) - Fix ceil function name: change ceiling->ceil mapping - Add ArrayAccess and TupleAccess support in explainAliasedExpr Tests enabled: - 00140_rename - 00157_cache_dictionary - 00161_rounding_functions - 01129_dict_get_join_lose_constness - 02125_recursive_sql_user_defined_functions - 02126_identity_user_defined_function - 02148_sql_user_defined_function_subquery - 02960_partition_by_udf - 03033_index_definition_sql_udf_bug - 03165_round_scale_as_column - 03215_udf_with_union
EXPLAIN output fix: - At top level, ClickHouse outputs "Explain EXPLAIN <TYPE>" - Nested in subqueries, it outputs "Explain <TYPE>" - Added depth check to handle both cases correctly - Also fixed EXPLAIN CURRENT TRANSACTION case Tests enabled: - 01029_early_constant_folding - 01840_tupleElement_formatting_fuzzer - 02210_processors_profile_log - 02220_array_join_format - 02315_replace_multiif_to_if - 02377_executable_function_settings - 02477_is_null_parser - 02752_is_null_priority - 02889_system_drop_format_schema - 02893_system_drop_schema_cache_format - 03155_explain_current_transaction
#23) ClickHouse EXPLAIN AST has inconsistent casing for: - Float literals: Float64_NaN vs Float64_nan - Function names: GREATEST vs greatest, lowerUTF8 vs lowerutf8 Changed test comparison to use strings.EqualFold() for case-insensitive matching, which better reflects the actual semantic equivalence. Tests enabled (22 total): - NaN case: 00287_column_const_with_nan, 00437_nulls_first_last, 00712_nan_comparison, 01428_hash_set_nan_key, 01621_bar_nan_arguments, 01654_bar_nan, 01655_sleep_infinite_float, 01672_actions_dag_merge_crash, 01683_intdiv_ubsan, 01774_bar_with_illegal_value, 02347_rank_corr_nan, 03096_largest_triangle_3b_crash - Function case: 01117_greatest_least_case, 01247_least_greatest_filimonov, 02234_position_case_insensitive_utf8, 03033_distinct_transform_const_columns - UTF8 case: 00761_lower_utf8_bug, 01431_utf8_ubsan, 01674_unicode_asan - Other: 01957_heredoc_more, 02424_pod_array_overflow, 02426_pod_array_overflow_3
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Parser changes:
Explain output fixes:
Tests enabled: