Add source location (#758)

Fixes #523

Reproduce `elog(ERROR, ...)` implementation to override the source
function/file/line.

Author: Y--

include/pgduckdb/utility/cpp_wrapper.hpp

@@ -10,7 +10,7 @@ namespace pgduckdb {
 
 template <typename Func, Func func, typename... FuncArgs>
 typename std::invoke_result<Func, FuncArgs &...>::type
-__CPPFunctionGuard__(const char *func_name, FuncArgs &...args) {
+__CPPFunctionGuard__(const char *func_name, const char *file_name, int line, FuncArgs &...args) {
 	const char *error_message = nullptr;
 	auto pg_es_start = PG_exception_stack;
 	try {
@@ -73,12 +73,18 @@ __CPPFunctionGuard__(const char *func_name, FuncArgs &...args) {
 		PG_exception_stack = pg_es_start;
 	}
 
-	elog(ERROR, "(PGDuckDB/%s) %s", func_name, error_message);
+	// Simplified version of `elog(ERROR, ...)`, with arguments inlined
+	if (errstart_cold(ERROR, TEXTDOMAIN)) {
+		errmsg_internal("(PGDuckDB/%s) %s", func_name, error_message);
+		errfinish(file_name, line, func_name);
+	}
+	pg_unreachable();
 }
 
 } // namespace pgduckdb
 
-#define InvokeCPPFunc(FUNC, ...) pgduckdb::__CPPFunctionGuard__<decltype(&FUNC), &FUNC>(#FUNC, ##__VA_ARGS__)
+#define InvokeCPPFunc(FUNC, ...)                                                                                       \
+	pgduckdb::__CPPFunctionGuard__<decltype(&FUNC), &FUNC>(#FUNC, __FILE__, __LINE__, ##__VA_ARGS__)
 
 // Wrappers
 

test/regression/expected/execution_error.out

@@ -9,3 +9,16 @@ ERROR:  (PGDuckDB/Duckdb_ExecCustomScan_Cpp) Conversion Error: Could not convert
 LINE 1:  SELECT (a)::integer AS a FROM pgduckdb.public.int_as_varchar
                    ^
 DROP TABLE int_as_varchar;
+\set VERBOSITY verbose
+select * from duckdb.raw_query('aaaaa');
+WARNING:  01000: (PGDuckDB/CreatePlan) Prepared query returned an error: 'Catalog Error: Table Function with name raw_query does not exist!
+Did you mean "main.pragma_user_agent"?
+
+LINE 1: SELECT raw_query FROM duckdb.raw_query('aaaaa'::text) raw_query(raw_query)
+                              ^
+LOCATION:  CreatePlan, pgduckdb_planner.cpp:58
+ERROR:  XX000: (PGDuckDB/pgduckdb_raw_query_cpp) Parser Error: syntax error at or near "aaaaa"
+
+LINE 1: aaaaa
+        ^
+LOCATION:  pgduckdb_raw_query_cpp, pgduckdb_options.cpp:212

test/regression/sql/execution_error.sql

@@ -6,3 +6,6 @@ INSERT INTO int_as_varchar SELECT * from (
 
 SELECT a::INTEGER FROM int_as_varchar;
 DROP TABLE int_as_varchar;
+
+\set VERBOSITY verbose
+select * from duckdb.raw_query('aaaaa');