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synced 2025-06-17 17:02:08 +03:00
Remove all time travel stuff. Small parser cleanup.
This commit is contained in:
Bruce Momjian
@ -6,45 +6,20 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/parser/parser.c,v 1.27 1997/11/17 16:59:08 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/parser/parser.c,v 1.28 1997/11/20 23:22:24 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include <string.h>
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#include <stdio.h>
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#include <pwd.h>
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#include <sys/param.h> /* for MAXPATHLEN */
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#include "postgres.h"
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#include "parser/catalog_utils.h"
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#include "parser/gramparse.h"
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#include "parser/parse_query.h"
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#include "nodes/pg_list.h"
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#include "nodes/execnodes.h"
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#include "nodes/makefuncs.h"
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#include "nodes/primnodes.h"
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#include "nodes/plannodes.h"
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#include "nodes/relation.h"
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#include "utils/builtins.h"
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#include "utils/exc.h"
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#include "utils/excid.h"
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#include "utils/lsyscache.h"
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#include "utils/palloc.h"
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#include "utils/syscache.h"
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#include "catalog/pg_aggregate.h"
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#include "catalog/pg_type.h"
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#include "access/heapam.h"
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#include "optimizer/clauses.h"
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void init_io(); /* from scan.l */
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void parser_init(Oid *typev, int nargs); /* from gram.y */
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int yyparse(); /* from gram.c */
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char *parseString; /* the char* which holds the string to be
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* parsed */
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char *parseCh; /* a pointer used during parsing to walk
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* down ParseString */
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List *parsetree = NIL;
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#ifdef SETS_FIXED
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@ -70,9 +45,7 @@ parser(char *str, Oid *typev, int nargs)
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init_io();
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/* Set things up to read from the string, if there is one */
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parseString = (char *) palloc(strlen(str) + 1);
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memmove(parseString, str, strlen(str) + 1);
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parseString = pstrdup(str);
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parser_init(typev, nargs);
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yyresult = yyparse();
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@ -83,10 +56,8 @@ parser(char *str, Oid *typev, int nargs)
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clearerr(stdin);
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if (yyresult)
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{ /* error */
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if (yyresult) /* error */
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return ((QueryTreeList *) NULL);
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}
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queryList = parse_analyze(parsetree);
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@ -205,339 +176,3 @@ define_sets(Node *clause)
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#endif
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/* not used
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#define PSIZE(PTR) (*((int32 *)(PTR) - 1))
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*/
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Node *
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parser_typecast(Value *expr, TypeName *typename, int typlen)
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{
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/* check for passing non-ints */
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Const *adt;
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Datum lcp;
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Type tp;
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char type_string[NAMEDATALEN];
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int32 len;
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char *cp = NULL;
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char *const_string = NULL;
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bool string_palloced = false;
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switch (nodeTag(expr))
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{
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case T_String:
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const_string = DatumGetPointer(expr->val.str);
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break;
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case T_Integer:
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%ld", expr->val.ival);
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break;
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default:
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elog(WARN,
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"parser_typecast: cannot cast this expression to type \"%s\"",
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typename->name);
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}
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if (typename->arrayBounds != NIL)
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{
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sprintf(type_string, "_%s", typename->name);
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tp = (Type) type(type_string);
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}
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else
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{
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tp = (Type) type(typename->name);
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}
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len = tlen(tp);
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#if 0 /* fix me */
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switch (CInteger(lfirst(expr)))
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{
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case INT4OID: /* int4 */
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%d", ((Const *) lnext(expr))->constvalue);
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break;
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case NAMEOID: /* char16 */
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%s", ((Const *) lnext(expr))->constvalue);
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break;
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case CHAROID: /* char */
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%c", ((Const) lnext(expr))->constvalue);
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break;
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case FLOAT8OID: /* float8 */
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%f", ((Const) lnext(expr))->constvalue);
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break;
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case CASHOID: /* money */
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%d",
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(int) ((Const *) expr)->constvalue);
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break;
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case TEXTOID: /* text */
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const_string = DatumGetPointer(((Const) lnext(expr))->constvalue);
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const_string = (char *) textout((struct varlena *) const_string);
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break;
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case UNKNOWNOID: /* unknown */
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const_string = DatumGetPointer(((Const) lnext(expr))->constvalue);
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const_string = (char *) textout((struct varlena *) const_string);
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break;
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default:
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elog(WARN, "unknown type %d", CInteger(lfirst(expr)));
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}
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#endif
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cp = instr2(tp, const_string, typlen);
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if (!tbyvalue(tp))
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{
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/*
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if (len >= 0 && len != PSIZE(cp)) {
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char *pp;
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pp = (char *) palloc(len);
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memmove(pp, cp, len);
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cp = pp;
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}
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*/
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lcp = PointerGetDatum(cp);
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}
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else
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{
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switch (len)
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{
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case 1:
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lcp = Int8GetDatum(cp);
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break;
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case 2:
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lcp = Int16GetDatum(cp);
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break;
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case 4:
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lcp = Int32GetDatum(cp);
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break;
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default:
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lcp = PointerGetDatum(cp);
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break;
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}
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}
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adt = makeConst(typeid(tp),
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len,
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(Datum) lcp,
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false,
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tbyvalue(tp),
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false, /* not a set */
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true /* is cast */ );
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if (string_palloced)
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pfree(const_string);
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return (Node *) adt;
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}
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Node *
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parser_typecast2(Node *expr, Oid exprType, Type tp, int typlen)
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{
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/* check for passing non-ints */
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Const *adt;
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Datum lcp;
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int32 len = tlen(tp);
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char *cp = NULL;
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char *const_string = NULL;
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bool string_palloced = false;
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Assert(IsA(expr, Const));
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switch (exprType)
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{
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case 0: /* NULL */
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break;
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case INT4OID: /* int4 */
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%d",
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(int) ((Const *) expr)->constvalue);
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break;
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case NAMEOID: /* char16 */
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%s",
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(char *) ((Const *) expr)->constvalue);
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break;
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case CHAROID: /* char */
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%c",
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(char) ((Const *) expr)->constvalue);
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break;
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case FLOAT4OID: /* float4 */
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{
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float32 floatVal =
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DatumGetFloat32(((Const *) expr)->constvalue);
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%f", *floatVal);
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break;
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}
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case FLOAT8OID: /* float8 */
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{
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float64 floatVal =
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DatumGetFloat64(((Const *) expr)->constvalue);
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%f", *floatVal);
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break;
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}
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case CASHOID: /* money */
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const_string = (char *) palloc(256);
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string_palloced = true;
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sprintf(const_string, "%ld",
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(long) ((Const *) expr)->constvalue);
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break;
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case TEXTOID: /* text */
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const_string =
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DatumGetPointer(((Const *) expr)->constvalue);
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const_string = (char *) textout((struct varlena *) const_string);
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break;
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case UNKNOWNOID: /* unknown */
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const_string =
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DatumGetPointer(((Const *) expr)->constvalue);
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const_string = (char *) textout((struct varlena *) const_string);
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break;
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default:
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elog(WARN, "unknown type %u ", exprType);
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}
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if (!exprType)
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{
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adt = makeConst(typeid(tp),
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(Size) 0,
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(Datum) NULL,
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true, /* isnull */
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false, /* was omitted */
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false, /* not a set */
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true /* is cast */ );
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return ((Node *) adt);
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}
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cp = instr2(tp, const_string, typlen);
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if (!tbyvalue(tp))
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{
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/*
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if (len >= 0 && len != PSIZE(cp)) {
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char *pp;
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pp = (char *) palloc(len);
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memmove(pp, cp, len);
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cp = pp;
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}
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*/
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lcp = PointerGetDatum(cp);
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}
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else
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{
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switch (len)
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{
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case 1:
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lcp = Int8GetDatum(cp);
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break;
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case 2:
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lcp = Int16GetDatum(cp);
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break;
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case 4:
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lcp = Int32GetDatum(cp);
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break;
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default:
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lcp = PointerGetDatum(cp);
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break;
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}
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}
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adt = makeConst(typeid(tp),
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(Size) len,
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(Datum) lcp,
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false,
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false, /* was omitted */
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false, /* not a set */
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true /* is cast */ );
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/*
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* printf("adt %s : %u %d %d\n",CString(expr),typeid(tp) , len,cp);
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*/
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if (string_palloced)
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pfree(const_string);
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return ((Node *) adt);
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}
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Aggreg *
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ParseAgg(char *aggname, Oid basetype, Node *target)
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{
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Oid fintype;
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Oid vartype;
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Oid xfn1;
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Form_pg_aggregate aggform;
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Aggreg *aggreg;
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HeapTuple theAggTuple;
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theAggTuple = SearchSysCacheTuple(AGGNAME, PointerGetDatum(aggname),
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ObjectIdGetDatum(basetype),
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0, 0);
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if (!HeapTupleIsValid(theAggTuple))
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{
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elog(WARN, "aggregate %s does not exist", aggname);
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}
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aggform = (Form_pg_aggregate) GETSTRUCT(theAggTuple);
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fintype = aggform->aggfinaltype;
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xfn1 = aggform->aggtransfn1;
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if (nodeTag(target) != T_Var && nodeTag(target) != T_Expr)
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elog(WARN, "parser: aggregate can only be applied on an attribute or expression");
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/* only aggregates with transfn1 need a base type */
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if (OidIsValid(xfn1))
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{
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basetype = aggform->aggbasetype;
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if (nodeTag(target) == T_Var)
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vartype = ((Var *) target)->vartype;
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else
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vartype = ((Expr *) target)->typeOid;
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if (basetype != vartype)
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{
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Type tp1,
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tp2;
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tp1 = get_id_type(basetype);
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tp2 = get_id_type(vartype);
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elog(NOTICE, "Aggregate type mismatch:");
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elog(WARN, "%s works on %s, not %s", aggname,
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tname(tp1), tname(tp2));
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}
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}
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aggreg = makeNode(Aggreg);
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aggreg->aggname = pstrdup(aggname);
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aggreg->basetype = aggform->aggbasetype;
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aggreg->aggtype = fintype;
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aggreg->target = target;
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return aggreg;
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}
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