diff options
Diffstat (limited to 'src/backend/parser')
| -rw-r--r-- | src/backend/parser/gram.y | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y index 5894cb0885c..ec88b710769 100644 --- a/src/backend/parser/gram.y +++ b/src/backend/parser/gram.y @@ -470,7 +470,7 @@ static void processCASbits(int cas_bits, int location, const char *constrType, %type <windef> window_definition over_clause window_specification opt_frame_clause frame_extent frame_bound %type <str> opt_existing_window_name - +%type <boolean> opt_if_not_exists /* * Non-keyword token types. These are hard-wired into the "flex" lexer. @@ -4618,35 +4618,42 @@ enum_val_list: Sconst *****************************************************************************/ AlterEnumStmt: - ALTER TYPE_P any_name ADD_P VALUE_P Sconst + ALTER TYPE_P any_name ADD_P VALUE_P opt_if_not_exists Sconst { AlterEnumStmt *n = makeNode(AlterEnumStmt); n->typeName = $3; - n->newVal = $6; + n->newVal = $7; n->newValNeighbor = NULL; n->newValIsAfter = true; + n->skipIfExists = $6; $$ = (Node *) n; } - | ALTER TYPE_P any_name ADD_P VALUE_P Sconst BEFORE Sconst + | ALTER TYPE_P any_name ADD_P VALUE_P opt_if_not_exists Sconst BEFORE Sconst { AlterEnumStmt *n = makeNode(AlterEnumStmt); n->typeName = $3; - n->newVal = $6; - n->newValNeighbor = $8; + n->newVal = $7; + n->newValNeighbor = $9; n->newValIsAfter = false; + n->skipIfExists = $6; $$ = (Node *) n; } - | ALTER TYPE_P any_name ADD_P VALUE_P Sconst AFTER Sconst + | ALTER TYPE_P any_name ADD_P VALUE_P opt_if_not_exists Sconst AFTER Sconst { AlterEnumStmt *n = makeNode(AlterEnumStmt); n->typeName = $3; - n->newVal = $6; - n->newValNeighbor = $8; + n->newVal = $7; + n->newValNeighbor = $9; n->newValIsAfter = true; + n->skipIfExists = $6; $$ = (Node *) n; } ; +opt_if_not_exists: IF_P NOT EXISTS { $$ = true; } + | /* empty */ { $$ = false; } + ; + /***************************************************************************** * |