cleanup
This commit is contained in:
Bruce Momjian
parent
985f4ab98a
commit
9cad9febb1
@ -9,11 +9,11 @@ keywords.c turn keywords into specific tokens
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gram.y parse the tokens and fill query-type-specific structures
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analyze.c handle post-parse processing for each query type
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parse_clause.c handle clauses like WHERE, ORDER BY, GROUP BY, ...
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parse_coerce.c used for coercing expressions of different types
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parse_expr.c handle expressions like col, col + 3, x = 3 or x = 4
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parse_oper.c handle operations in expressions
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parse_agg.c handle aggregates, like SUM(col1), AVG(col2), ...
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parse_func.c handle functions, table.column and column identifiers
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parse_node.c create nodes for various structures
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parse_target.c handle the result list of the query
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parse_relation.c support routines for tables and column handling
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@ -7,7 +7,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.21 1998/08/19 02:02:26 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.22 1998/08/23 14:43:46 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -187,6 +187,154 @@ printf("transformTargetIdent- attrtype_target = %d; type_mod = %d\n", attrtype_t
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} /* transformTargetIdent() */
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/* MakeTargetlistExpr()
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* Make a TargetEntry from an expression.
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* arrayRef is a list of transformed A_Indices.
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*
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* For type mismatches between expressions and targets, use the same
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* techniques as for function and operator type coersion.
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* - thomas 1998-05-08
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*
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* Added resjunk flag and made extern so that it can be use by GROUP/
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* ORDER BY a function or expersion not in the target_list
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* - daveh@insightdist.com 1998-07-31
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*/
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TargetEntry *
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MakeTargetlistExpr(ParseState *pstate,
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char *colname,
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Node *expr,
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List *arrayRef,
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int16 resjunk)
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{
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Oid type_id,
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attrtype;
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int32 type_mod,
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attrtypmod;
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int resdomno;
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Relation rd;
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bool attrisset;
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TargetEntry *tent;
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Resdom *resnode;
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if (expr == NULL)
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elog(ERROR, "MakeTargetlistExpr: invalid use of NULL expression");
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type_id = exprType(expr);
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if (nodeTag(expr) == T_Var)
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type_mod = ((Var *) expr)->vartypmod;
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else
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type_mod = -1;
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/* Processes target columns that will be receiving results */
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if (pstate->p_is_insert || pstate->p_is_update)
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{
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/*
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* insert or update query -- insert, update work only on one
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* relation, so multiple occurence of same resdomno is bogus
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*/
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rd = pstate->p_target_relation;
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Assert(rd != NULL);
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resdomno = attnameAttNum(rd, colname);
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attrisset = attnameIsSet(rd, colname);
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attrtype = attnumTypeId(rd, resdomno);
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if ((arrayRef != NIL) && (lfirst(arrayRef) == NIL))
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attrtype = GetArrayElementType(attrtype);
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attrtypmod = rd->rd_att->attrs[resdomno - 1]->atttypmod;
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/* Check for InvalidOid since that seems to indicate a NULL constant... */
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if (type_id != InvalidOid)
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{
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/* Mismatch on types? then try to coerce to target... */
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if (attrtype != type_id)
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{
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Oid typelem;
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if (arrayRef && !(((A_Indices *) lfirst(arrayRef))->lidx))
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typelem = typeidTypElem(attrtype);
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else
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typelem = attrtype;
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expr = CoerceTargetExpr(pstate, expr, type_id, typelem);
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if (!HeapTupleIsValid(expr))
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elog(ERROR, "parser: attribute '%s' is of type '%s'"
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" but expression is of type '%s'"
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"\n\tYou will need to rewrite or cast the expression",
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colname,
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typeidTypeName(attrtype),
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typeidTypeName(type_id));
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}
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#ifdef PARSEDEBUG
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printf("MakeTargetlistExpr: attrtypmod is %d\n", (int4) attrtypmod);
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#endif
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/* Apparently going to a fixed-length string?
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* Then explicitly size for storage...
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*/
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if (attrtypmod > 0)
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expr = SizeTargetExpr(pstate, expr, attrtype, attrtypmod);
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}
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if (arrayRef != NIL)
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{
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Expr *target_expr;
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Attr *att = makeNode(Attr);
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List *ar = arrayRef;
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List *upperIndexpr = NIL;
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List *lowerIndexpr = NIL;
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att->relname = pstrdup(RelationGetRelationName(rd)->data);
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att->attrs = lcons(makeString(colname), NIL);
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target_expr = (Expr *) ParseNestedFuncOrColumn(pstate, att,
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&pstate->p_last_resno,
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EXPR_COLUMN_FIRST);
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while (ar != NIL)
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{
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A_Indices *ind = lfirst(ar);
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if (lowerIndexpr || (!upperIndexpr && ind->lidx))
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{
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/*
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* XXX assume all lowerIndexpr is non-null in this
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* case
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*/
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lowerIndexpr = lappend(lowerIndexpr, ind->lidx);
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}
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upperIndexpr = lappend(upperIndexpr, ind->uidx);
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ar = lnext(ar);
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}
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expr = (Node *) make_array_set(target_expr,
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upperIndexpr,
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lowerIndexpr,
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(Expr *) expr);
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attrtype = attnumTypeId(rd, resdomno);
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attrtypmod = get_atttypmod(RelationGetRelid(rd), resdomno);
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}
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}
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else
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{
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resdomno = pstate->p_last_resno++;
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attrtype = type_id;
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attrtypmod = type_mod;
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}
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resnode = makeResdom((AttrNumber) resdomno,
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(Oid) attrtype,
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attrtypmod,
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colname,
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(Index) 0,
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(Oid) 0,
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resjunk);
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tent = makeTargetEntry(resnode, expr);
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return tent;
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} /* MakeTargetlistExpr() */
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/* transformTargetList()
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* Turns a list of ResTarget's into a list of TargetEntry's.
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*/
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@ -299,7 +447,6 @@ printf("transformTargetList: decode T_Expr\n");
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/* this is not an array assignment */
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if (colname == NULL)
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{
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/*
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* if you're wondering why this is here, look
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* at the yacc grammar for why a name can be
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@ -559,154 +706,6 @@ printf("SizeTargetExpr: no conversion function for sizing\n");
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} /* SizeTargetExpr() */
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/* MakeTargetlistExpr()
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* Make a TargetEntry from an expression.
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* arrayRef is a list of transformed A_Indices.
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*
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* For type mismatches between expressions and targets, use the same
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* techniques as for function and operator type coersion.
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* - thomas 1998-05-08
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*
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* Added resjunk flag and made extern so that it can be use by GROUP/
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* ORDER BY a function or expersion not in the target_list
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* - daveh@insightdist.com 1998-07-31
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*/
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TargetEntry *
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MakeTargetlistExpr(ParseState *pstate,
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char *colname,
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Node *expr,
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List *arrayRef,
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int16 resjunk)
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{
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Oid type_id,
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attrtype;
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int32 type_mod,
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attrtypmod;
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int resdomno;
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Relation rd;
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bool attrisset;
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TargetEntry *tent;
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Resdom *resnode;
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if (expr == NULL)
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elog(ERROR, "MakeTargetlistExpr: invalid use of NULL expression");
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type_id = exprType(expr);
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if (nodeTag(expr) == T_Var)
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type_mod = ((Var *) expr)->vartypmod;
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else
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type_mod = -1;
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/* Processes target columns that will be receiving results */
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if (pstate->p_is_insert || pstate->p_is_update)
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{
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/*
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* insert or update query -- insert, update work only on one
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* relation, so multiple occurence of same resdomno is bogus
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*/
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rd = pstate->p_target_relation;
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Assert(rd != NULL);
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resdomno = attnameAttNum(rd, colname);
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attrisset = attnameIsSet(rd, colname);
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attrtype = attnumTypeId(rd, resdomno);
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if ((arrayRef != NIL) && (lfirst(arrayRef) == NIL))
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attrtype = GetArrayElementType(attrtype);
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attrtypmod = rd->rd_att->attrs[resdomno - 1]->atttypmod;
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/* Check for InvalidOid since that seems to indicate a NULL constant... */
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if (type_id != InvalidOid)
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{
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/* Mismatch on types? then try to coerce to target... */
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if (attrtype != type_id)
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{
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Oid typelem;
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if (arrayRef && !(((A_Indices *) lfirst(arrayRef))->lidx))
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typelem = typeidTypElem(attrtype);
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else
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typelem = attrtype;
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expr = CoerceTargetExpr(pstate, expr, type_id, typelem);
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if (!HeapTupleIsValid(expr))
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elog(ERROR, "parser: attribute '%s' is of type '%s'"
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" but expression is of type '%s'"
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"\n\tYou will need to rewrite or cast the expression",
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colname,
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typeidTypeName(attrtype),
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typeidTypeName(type_id));
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}
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#ifdef PARSEDEBUG
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printf("MakeTargetlistExpr: attrtypmod is %d\n", (int4) attrtypmod);
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#endif
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/* Apparently going to a fixed-length string?
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* Then explicitly size for storage...
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*/
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if (attrtypmod > 0)
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expr = SizeTargetExpr(pstate, expr, attrtype, attrtypmod);
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}
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if (arrayRef != NIL)
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{
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Expr *target_expr;
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Attr *att = makeNode(Attr);
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List *ar = arrayRef;
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List *upperIndexpr = NIL;
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List *lowerIndexpr = NIL;
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att->relname = pstrdup(RelationGetRelationName(rd)->data);
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att->attrs = lcons(makeString(colname), NIL);
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target_expr = (Expr *) ParseNestedFuncOrColumn(pstate, att,
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&pstate->p_last_resno,
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EXPR_COLUMN_FIRST);
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while (ar != NIL)
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{
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A_Indices *ind = lfirst(ar);
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if (lowerIndexpr || (!upperIndexpr && ind->lidx))
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{
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/*
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* XXX assume all lowerIndexpr is non-null in this
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* case
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*/
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lowerIndexpr = lappend(lowerIndexpr, ind->lidx);
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}
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upperIndexpr = lappend(upperIndexpr, ind->uidx);
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ar = lnext(ar);
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}
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expr = (Node *) make_array_set(target_expr,
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upperIndexpr,
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lowerIndexpr,
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(Expr *) expr);
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attrtype = attnumTypeId(rd, resdomno);
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attrtypmod = get_atttypmod(RelationGetRelid(rd), resdomno);
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}
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}
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else
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{
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resdomno = pstate->p_last_resno++;
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attrtype = type_id;
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attrtypmod = type_mod;
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}
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resnode = makeResdom((AttrNumber) resdomno,
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(Oid) attrtype,
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attrtypmod,
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colname,
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(Index) 0,
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(Oid) 0,
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resjunk);
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tent = makeTargetEntry(resnode, expr);
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return tent;
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} /* MakeTargetlistExpr() */
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/*
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* makeTargetNames -
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* generate a list of column names if not supplied or
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