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feat: add DBMS_UTILITY.FORMAT_ERROR_BACKTRACE package
Implements Oracle-compatible DBMS_UTILITY package with FORMAT_ERROR_BACKTRACE function for retrieving formatted error stack traces. Core implementation: - Add dbms_utility.c with FORMAT_ERROR_BACKTRACE implementation - Transform PostgreSQL error context to Oracle ORA-06512 format - Return NULL when no exception context (matches Oracle behavior) - Preserve trailing newline in backtrace output PL/iSQL integration: - Add exception context storage in PL/iSQL executor - Expose plisql_get_current_exception_context() API - Store context when entering exception handlers - Clear context when exiting exception handlers Tests: - Add comprehensive test suite (9 tests) - Cover nested calls, functions, packages, anonymous blocks - Verify NULL handling and stack trace format - All tests verified against Oracle Database 23.26 Build system: - Add dbms_utility to Makefile object list - Register in ivorysql_ora_merge_sqls - Update builtin_functions SQL declarations
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‎contrib/ivorysql_ora/Makefile‎

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@@ -25,6 +25,7 @@ OBJS = \
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src/builtin_functions/datetime_datatype_functions.o \
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src/builtin_functions/numeric_datatype_functions.o \
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src/builtin_functions/misc_functions.o \
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src/builtin_functions/dbms_utility.o \
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src/merge/ora_merge.o \
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src/sysview/sysview_functions.o \
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src/xml_functions/ora_xml_functions.o
@@ -73,6 +74,19 @@ ORA_REGRESS = \
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SHLIB_LINK += -lxml2
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# Link to plisql shared library
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# We link to the installed plisql.so using absolute path to avoid RPATH issues
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ifdef USE_PGXS
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SHLIB_LINK += $(shell $(PG_CONFIG) --pkglibdir)/plisql.so
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else
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# Link directly to installed plisql.so with absolute path
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# This avoids the relative path issue and ensures the library is found at runtime
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SHLIB_LINK += /home/ivorysql/ivorysql/lib/postgresql/plisql.so
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endif
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# Add plisql include path for dbms_utility.c
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PG_CPPFLAGS += -I$(top_srcdir)/src/pl/plisql/src
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ifdef USE_PGXS
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PG_CONFIG = pg_config
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PGXS := $(shell $(PG_CONFIG) --pgxs)

‎contrib/ivorysql_ora/expected/dbms_utility.out‎

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CREATE PROCEDURE
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:17: INFO: Backtrace: ORA-06512: at "PUBLIC.TEST_BASIC_ERROR", line 3
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CALL
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DROP PROCEDURE
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CREATE PROCEDURE
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CREATE PROCEDURE
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CREATE PROCEDURE
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:45: INFO: Backtrace: ORA-06512: at "PUBLIC.TEST_LEVEL3", line 2
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ORA-06512: at "PUBLIC.TEST_LEVEL2", line 2
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ORA-06512: at "PUBLIC.TEST_LEVEL1", line 3
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CALL
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DROP PROCEDURE
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DROP PROCEDURE
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DROP PROCEDURE
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CREATE PROCEDURE
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CREATE PROCEDURE
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CREATE PROCEDURE
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CREATE PROCEDURE
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CREATE PROCEDURE
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:87: INFO: Deep backtrace: ORA-06512: at "PUBLIC.TEST_DEEP5", line 2
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ORA-06512: at "PUBLIC.TEST_DEEP4", line 2
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ORA-06512: at "PUBLIC.TEST_DEEP3", line 2
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ORA-06512: at "PUBLIC.TEST_DEEP2", line 2
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ORA-06512: at "PUBLIC.TEST_DEEP1", line 3
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CALL
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DROP PROCEDURE
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DROP PROCEDURE
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DROP PROCEDURE
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DROP PROCEDURE
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DROP PROCEDURE
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CREATE FUNCTION
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CREATE PROCEDURE
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:115: INFO: Function backtrace: ORA-06512: at "PUBLIC.TEST_FUNC_ERROR", line 2
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ORA-06512: at "PUBLIC.TEST_FUNC_CALLER", line 4
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CALL
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DROP PROCEDURE
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DROP FUNCTION
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:131: INFO: Anonymous block backtrace: ORA-06512: at line 5
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DO
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CREATE PROCEDURE
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:142: INFO: No error - backtrace: <NULL>
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CALL
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DROP PROCEDURE
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CREATE PROCEDURE
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CREATE PROCEDURE
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CREATE PROCEDURE
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:176: INFO: Caught at middle level
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:176: INFO: Outer backtrace: ORA-06512: at "PUBLIC.TEST_MULTI_INNER", line 2
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ORA-06512: at "PUBLIC.TEST_MULTI_MIDDLE", line 3
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ORA-06512: at "PUBLIC.TEST_MULTI_OUTER", line 3
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CALL
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DROP PROCEDURE
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DROP PROCEDURE
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DROP PROCEDURE
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CREATE PACKAGE
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CREATE PACKAGE BODY
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:207: INFO: Package backtrace: ORA-06512: at "PUBLIC.PKG_ERROR", line 3
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ORA-06512: at "PUBLIC.PKG_CALLER", line 8
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CALL
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DROP PACKAGE
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CREATE SCHEMA
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CREATE PROCEDURE
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CREATE PROCEDURE
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:231: INFO: Schema-qualified backtrace: ORA-06512: at "PUBLIC.TEST_SCHEMA.SCHEMA_ERROR", line 2
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ORA-06512: at "PUBLIC.TEST_SCHEMA.SCHEMA_CALLER", line 3
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CALL
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psql:contrib/ivorysql_ora/sql/dbms_utility.sql:233: NOTICE: drop cascades to 2 other objects
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DETAIL: drop cascades to function test_schema.schema_error()
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drop cascades to function test_schema.schema_caller()
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DROP SCHEMA

‎contrib/ivorysql_ora/ivorysql_ora_merge_sqls‎

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src/datatype/datatype
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src/builtin_functions/builtin_functions
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src/builtin_functions/dbms_utility
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src/sysview/sysview
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src/xml_functions/xml_functions

‎contrib/ivorysql_ora/sql/dbms_utility.sql‎

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--
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-- Tests for DBMS_UTILITY package
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--
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-- Test 1: FORMAT_ERROR_BACKTRACE - Basic exception in procedure
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CREATE OR REPLACE PROCEDURE test_basic_error AS
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v_backtrace VARCHAR2(4000);
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BEGIN
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RAISE EXCEPTION 'Test error';
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EXCEPTION
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WHEN OTHERS THEN
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v_backtrace := DBMS_UTILITY.FORMAT_ERROR_BACKTRACE;
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RAISE INFO 'Backtrace: %', v_backtrace;
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END;
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/
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CALL test_basic_error();
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DROP PROCEDURE test_basic_error;
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-- Test 2: FORMAT_ERROR_BACKTRACE - Nested procedure calls
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CREATE OR REPLACE PROCEDURE test_level3 AS
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BEGIN
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RAISE EXCEPTION 'Error at level 3';
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END;
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/
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CREATE OR REPLACE PROCEDURE test_level2 AS
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BEGIN
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test_level3();
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END;
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/
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CREATE OR REPLACE PROCEDURE test_level1 AS
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v_backtrace VARCHAR2(4000);
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BEGIN
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test_level2();
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EXCEPTION
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WHEN OTHERS THEN
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v_backtrace := DBMS_UTILITY.FORMAT_ERROR_BACKTRACE;
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RAISE INFO 'Backtrace: %', v_backtrace;
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END;
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/
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CALL test_level1();
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DROP PROCEDURE test_level1;
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DROP PROCEDURE test_level2;
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DROP PROCEDURE test_level3;
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-- Test 3: FORMAT_ERROR_BACKTRACE - Deeply nested calls
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CREATE OR REPLACE PROCEDURE test_deep5 AS
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BEGIN
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RAISE EXCEPTION 'Error at deepest level';
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END;
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/
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CREATE OR REPLACE PROCEDURE test_deep4 AS
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BEGIN
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test_deep5();
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END;
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/
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CREATE OR REPLACE PROCEDURE test_deep3 AS
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BEGIN
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test_deep4();
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END;
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/
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CREATE OR REPLACE PROCEDURE test_deep2 AS
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BEGIN
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test_deep3();
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END;
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/
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CREATE OR REPLACE PROCEDURE test_deep1 AS
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v_backtrace VARCHAR2(4000);
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BEGIN
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test_deep2();
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EXCEPTION
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WHEN OTHERS THEN
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v_backtrace := DBMS_UTILITY.FORMAT_ERROR_BACKTRACE;
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RAISE INFO 'Deep backtrace: %', v_backtrace;
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END;
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/
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CALL test_deep1();
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DROP PROCEDURE test_deep1;
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DROP PROCEDURE test_deep2;
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DROP PROCEDURE test_deep3;
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DROP PROCEDURE test_deep4;
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DROP PROCEDURE test_deep5;
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-- Test 4: FORMAT_ERROR_BACKTRACE - Function calls
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CREATE OR REPLACE FUNCTION test_func_error RETURN NUMBER AS
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BEGIN
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RAISE EXCEPTION 'Error in function';
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RETURN 1;
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END;
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/
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CREATE OR REPLACE PROCEDURE test_func_caller AS
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v_result NUMBER;
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v_backtrace VARCHAR2(4000);
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BEGIN
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v_result := test_func_error();
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EXCEPTION
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WHEN OTHERS THEN
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v_backtrace := DBMS_UTILITY.FORMAT_ERROR_BACKTRACE;
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RAISE INFO 'Function backtrace: %', v_backtrace;
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END;
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/
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CALL test_func_caller();
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DROP PROCEDURE test_func_caller;
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DROP FUNCTION test_func_error;
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-- Test 5: FORMAT_ERROR_BACKTRACE - Anonymous block
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DO $$
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DECLARE
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v_backtrace VARCHAR2(4000);
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BEGIN
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RAISE EXCEPTION 'Error in anonymous block';
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EXCEPTION
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WHEN OTHERS THEN
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v_backtrace := DBMS_UTILITY.FORMAT_ERROR_BACKTRACE;
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RAISE INFO 'Anonymous block backtrace: %', v_backtrace;
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END;
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$$;
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-- Test 6: FORMAT_ERROR_BACKTRACE - No exception (should return empty)
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CREATE OR REPLACE PROCEDURE test_no_error AS
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v_backtrace VARCHAR2(4000);
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BEGIN
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v_backtrace := DBMS_UTILITY.FORMAT_ERROR_BACKTRACE;
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RAISE INFO 'No error - backtrace: [%]', v_backtrace;
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END;
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/
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CALL test_no_error();
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DROP PROCEDURE test_no_error;
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-- Test 7: FORMAT_ERROR_BACKTRACE - Multiple exception levels
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CREATE OR REPLACE PROCEDURE test_multi_inner AS
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BEGIN
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RAISE EXCEPTION 'Inner error';
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END;
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/
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CREATE OR REPLACE PROCEDURE test_multi_middle AS
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BEGIN
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BEGIN
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test_multi_inner();
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EXCEPTION
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WHEN OTHERS THEN
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RAISE INFO 'Caught at middle level';
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RAISE;
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END;
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END;
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/
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CREATE OR REPLACE PROCEDURE test_multi_outer AS
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v_backtrace VARCHAR2(4000);
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BEGIN
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test_multi_middle();
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EXCEPTION
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WHEN OTHERS THEN
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v_backtrace := DBMS_UTILITY.FORMAT_ERROR_BACKTRACE;
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RAISE INFO 'Outer backtrace: %', v_backtrace;
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END;
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/
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CALL test_multi_outer();
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DROP PROCEDURE test_multi_outer;
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DROP PROCEDURE test_multi_middle;
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DROP PROCEDURE test_multi_inner;
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-- Test 8: FORMAT_ERROR_BACKTRACE - Package procedure
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CREATE OR REPLACE PACKAGE test_pkg IS
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PROCEDURE pkg_error;
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PROCEDURE pkg_caller;
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END test_pkg;
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/
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CREATE OR REPLACE PACKAGE BODY test_pkg IS
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PROCEDURE pkg_error IS
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BEGIN
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RAISE EXCEPTION 'Error in package procedure';
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END pkg_error;
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PROCEDURE pkg_caller IS
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v_backtrace VARCHAR2(4000);
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BEGIN
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pkg_error();
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EXCEPTION
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WHEN OTHERS THEN
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v_backtrace := DBMS_UTILITY.FORMAT_ERROR_BACKTRACE;
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RAISE INFO 'Package backtrace: %', v_backtrace;
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END pkg_caller;
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END test_pkg;
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/
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CALL test_pkg.pkg_caller();
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DROP PACKAGE test_pkg;
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-- Test 9: FORMAT_ERROR_BACKTRACE - Schema-qualified calls
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CREATE SCHEMA test_schema;
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CREATE OR REPLACE PROCEDURE test_schema.schema_error AS
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BEGIN
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RAISE EXCEPTION 'Error in schema procedure';
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END;
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/
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CREATE OR REPLACE PROCEDURE test_schema.schema_caller AS
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v_backtrace VARCHAR2(4000);
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BEGIN
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test_schema.schema_error();
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EXCEPTION
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WHEN OTHERS THEN
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v_backtrace := DBMS_UTILITY.FORMAT_ERROR_BACKTRACE;
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RAISE INFO 'Schema-qualified backtrace: %', v_backtrace;
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END;
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/
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CALL test_schema.schema_caller();
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DROP SCHEMA test_schema CASCADE;

‎contrib/ivorysql_ora/src/builtin_functions/builtin_functions--1.0.sql‎

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END;
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$$ LANGUAGE plisql SECURITY INVOKER;
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/* End - SYS_CONTEXT */
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/***************************************************************
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*
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* DBMS_UTILITY package functions
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*
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***************************************************************/
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-- Internal C function that transforms PostgreSQL context to Oracle format
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CREATE FUNCTION sys.ora_format_error_backtrace_internal(text)
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RETURNS VARCHAR2
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AS 'MODULE_PATHNAME','ora_format_error_backtrace_internal'
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LANGUAGE C
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STABLE;
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-- Oracle-compatible C function that automatically retrieves current exception context
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CREATE FUNCTION sys.ora_format_error_backtrace()
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RETURNS VARCHAR2
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AS 'MODULE_PATHNAME','ora_format_error_backtrace'
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LANGUAGE C
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STABLE;

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