diff options
Diffstat (limited to 'src/backend/executor/execQual.c')
| -rw-r--r-- | src/backend/executor/execQual.c | 74 |
1 files changed, 41 insertions, 33 deletions
diff --git a/src/backend/executor/execQual.c b/src/backend/executor/execQual.c index 78c91539c7f..55a12bd8317 100644 --- a/src/backend/executor/execQual.c +++ b/src/backend/executor/execQual.c @@ -7,7 +7,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/executor/execQual.c,v 1.25 1998/02/13 03:26:42 vadim Exp $ + * $Header: /cvsroot/pgsql/src/backend/executor/execQual.c,v 1.26 1998/02/26 04:31:13 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -71,19 +71,24 @@ int execConstLen; /* static functions decls */ static Datum ExecEvalAggreg(Aggreg *agg, ExprContext *econtext, bool *isNull); -static Datum ExecEvalArrayRef(ArrayRef *arrayRef, ExprContext *econtext, +static Datum +ExecEvalArrayRef(ArrayRef *arrayRef, ExprContext *econtext, bool *isNull, bool *isDone); static Datum ExecEvalAnd(Expr *andExpr, ExprContext *econtext, bool *isNull); -static Datum ExecEvalFunc(Expr *funcClause, ExprContext *econtext, +static Datum +ExecEvalFunc(Expr *funcClause, ExprContext *econtext, bool *isNull, bool *isDone); -static void ExecEvalFuncArgs(FunctionCachePtr fcache, ExprContext *econtext, +static void +ExecEvalFuncArgs(FunctionCachePtr fcache, ExprContext *econtext, List *argList, Datum argV[], bool *argIsDone); static Datum ExecEvalNot(Expr *notclause, ExprContext *econtext, bool *isNull); -static Datum ExecEvalOper(Expr *opClause, ExprContext *econtext, +static Datum +ExecEvalOper(Expr *opClause, ExprContext *econtext, bool *isNull); static Datum ExecEvalOr(Expr *orExpr, ExprContext *econtext, bool *isNull); static Datum ExecEvalVar(Var *variable, ExprContext *econtext, bool *isNull); -static Datum ExecMakeFunctionResult(Node *node, List *arguments, +static Datum +ExecMakeFunctionResult(Node *node, List *arguments, ExprContext *econtext, bool *isNull, bool *isDone); static bool ExecQualClause(Node *clause, ExprContext *econtext); @@ -301,10 +306,11 @@ ExecEvalVar(Var *variable, ExprContext *econtext, bool *isNull) return (Datum) tempSlot; } - result = heap_getattr(heapTuple, /* tuple containing attribute */ - attnum, /* attribute number of desired attribute */ - tuple_type,/* tuple descriptor of tuple */ - isNull); /* return: is attribute null? */ + result = heap_getattr(heapTuple, /* tuple containing attribute */ + attnum, /* attribute number of desired + * attribute */ + tuple_type, /* tuple descriptor of tuple */ + isNull); /* return: is attribute null? */ /* ---------------- * return null if att is null @@ -379,18 +385,18 @@ ExecEvalParam(Param *expression, ExprContext *econtext, bool *isNull) AttrNumber thisParameterId = expression->paramid; int matchFound; ParamListInfo paramList; - - if ( thisParameterKind == PARAM_EXEC ) + + if (thisParameterKind == PARAM_EXEC) { - ParamExecData *prm = &(econtext->ecxt_param_exec_vals[thisParameterId]); - - if ( prm->execPlan != NULL ) - ExecSetParamPlan (prm->execPlan); - Assert (prm->execPlan == NULL); + ParamExecData *prm = &(econtext->ecxt_param_exec_vals[thisParameterId]); + + if (prm->execPlan != NULL) + ExecSetParamPlan(prm->execPlan); + Assert(prm->execPlan == NULL); *isNull = prm->isnull; return (prm->value); } - + thisParameterName = expression->paramname; paramList = econtext->ecxt_param_list_info; @@ -544,7 +550,7 @@ GetAttributeByNum(TupleTableSlot *slot, /* XXX char16 name for catalogs */ #ifdef NOT_USED -char * +char * att_by_num(TupleTableSlot *slot, AttrNumber attrno, bool *isNull) @@ -554,7 +560,7 @@ att_by_num(TupleTableSlot *slot, #endif -char * +char * GetAttributeByName(TupleTableSlot *slot, char *attname, bool *isNull) { AttrNumber attrno; @@ -605,7 +611,7 @@ GetAttributeByName(TupleTableSlot *slot, char *attname, bool *isNull) /* XXX char16 name for catalogs */ #ifdef NOT_USED -char * +char * att_by_name(TupleTableSlot *slot, char *attname, bool *isNull) { return (GetAttributeByName(slot, attname, isNull)); @@ -1045,19 +1051,21 @@ ExecEvalOr(Expr *orExpr, ExprContext *econtext, bool *isNull) if (*isNull) { IsNull = *isNull; + /* - * Many functions don't (or can't!) check is an argument - * NULL or NOT_NULL and may return TRUE (1) with *isNull TRUE - * (an_int4_column <> 1: int4ne returns TRUE for NULLs). - * Not having time to fix function manager I want to fix - * OR: if we had 'x <> 1 OR x isnull' then TRUE, TRUE were - * returned by 'x <> 1' for NULL ... but ExecQualClause say - * that qualification *fails* if isnull is TRUE for all values - * returned by ExecEvalExpr. So, force this rule here: if isnull - * is TRUE then clause failed. Note: nullvalue() & nonnullvalue() - * always set isnull to FALSE for NULLs. - vadim 09/22/97 + * Many functions don't (or can't!) check is an argument NULL + * or NOT_NULL and may return TRUE (1) with *isNull TRUE + * (an_int4_column <> 1: int4ne returns TRUE for NULLs). Not + * having time to fix function manager I want to fix OR: if we + * had 'x <> 1 OR x isnull' then TRUE, TRUE were returned by + * 'x <> 1' for NULL ... but ExecQualClause say that + * qualification *fails* if isnull is TRUE for all values + * returned by ExecEvalExpr. So, force this rule here: if + * isnull is TRUE then clause failed. Note: nullvalue() & + * nonnullvalue() always set isnull to FALSE for NULLs. - + * vadim 09/22/97 */ - const_value = 0; + const_value = 0; } /* ---------------- @@ -1238,7 +1246,7 @@ ExecEvalExpr(Node *expression, retDatum = (Datum) ExecEvalNot(expr, econtext, isNull); break; case SUBPLAN_EXPR: - retDatum = (Datum) ExecSubPlan((SubPlan*) expr->oper, expr->args, econtext); + retDatum = (Datum) ExecSubPlan((SubPlan *) expr->oper, expr->args, econtext); break; default: elog(ERROR, "ExecEvalExpr: unknown expression type %d", expr->opType); |