[tarantool-patches] [PATCH v2 1/8] sql: remove SQL_PreferBuiltin flag

[Kirill Shcherbatov <kshcherbatov@tarantool.org>]

The SQL_PreferBuiltin flag is redundant (because builtin names
are forbidden for UDFs) so we may to remove it.

Needed for #4113, #2200, #2233
---
 src/box/sql/sqlInt.h   | 1 -
 src/box/sql/callback.c | 9 +--------
 2 files changed, 1 insertion(+), 9 deletions(-)

diff --git a/src/box/sql/sqlInt.h b/src/box/sql/sqlInt.h
index 87e5d22ee..4adb30c5c 100644
--- a/src/box/sql/sqlInt.h
+++ b/src/box/sql/sqlInt.h
@@ -1196,7 +1196,6 @@ struct sql {
 #define SQL_ReverseOrder   0x00020000	/* Reverse unordered SELECTs */
 #define SQL_RecTriggers    0x00040000	/* Enable recursive triggers */
 #define SQL_AutoIndex      0x00100000	/* Enable automatic indexes */
-#define SQL_PreferBuiltin  0x00200000	/* Preference to built-in funcs */
 #define SQL_EnableTrigger  0x01000000	/* True to enable triggers */
 #define SQL_DeferFKs       0x02000000	/* Defer all FK constraints */
 #define SQL_VdbeEQP        0x08000000	/* Debug EXPLAIN QUERY PLAN */
diff --git a/src/box/sql/callback.c b/src/box/sql/callback.c
index 49197532e..6c272de71 100644
--- a/src/box/sql/callback.c
+++ b/src/box/sql/callback.c
@@ -191,7 +191,6 @@ sqlFindFunction(sql * db,	/* An open database */
 	int bestScore = 0;	/* Score of best match */
 	int h;			/* Hash value */
 	int nName;		/* Length of the name */
-	struct session *user_session = current_session();
 
 	assert(nArg >= (-2));
 	assert(nArg >= (-1) || createFlag == 0);
@@ -210,10 +209,6 @@ sqlFindFunction(sql * db,	/* An open database */
 	}
 
 	/* If no match is found, search the built-in functions.
-	 *
-	 * If the SQL_PreferBuiltin flag is set, then search the built-in
-	 * functions even if a prior app-defined function was found.  And give
-	 * priority to built-in functions.
 	 *
 	 * Except, if createFlag is true, that means that we are trying to
 	 * install a new function.  Whatever FuncDef structure is returned it will
@@ -221,9 +216,7 @@ sqlFindFunction(sql * db,	/* An open database */
 	 * new function.  But the FuncDefs for built-in functions are read-only.
 	 * So we must not search for built-ins when creating a new function.
 	 */
-	if (!createFlag &&
-	    (pBest == 0
-	     || (user_session->sql_flags & SQL_PreferBuiltin) != 0)) {
+	if (!createFlag && (pBest == NULL)) {
 		bestScore = 0;
 		h = (sqlUpperToLower[(u8) zName[0]] +
 		     nName) % SQL_FUNC_HASH_SZ;
-- 
2.22.0