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Implement CASE expression.

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This commit is contained in:
Thomas G. Lockhart
1998-12-04 15:34:49 +00:00
parent 19740e2fff
commit bedd04a551
17 changed files with 779 additions and 110 deletions
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25
src/backend/parser/analyze.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.89 1998/10/28 16:06:54 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.90 1998/12/04 15:34:28 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@ -396,7 +396,7 @@ transformInsertStmt(ParseState *pstate, InsertStmt *stmt)
*/
if ((qry->hasAggs == false) && (qry->havingQual != NULL))
{
elog(ERROR, "This is not a valid having query!");
elog(ERROR, "SELECT/HAVING requires aggregates to be valid");
return (Query *) NIL;
}
@ -621,7 +621,7 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
break;
default:
elog(ERROR, "parser: internal error; unrecognized constraint", NULL);
elog(ERROR, "parser: unrecognized constraint (internal error)", NULL);
break;
}
clist = lnext(clist);
@ -653,16 +653,16 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
case CONSTR_NOTNULL:
case CONSTR_DEFAULT:
elog(ERROR, "parser: internal error; illegal context for constraint", NULL);
elog(ERROR, "parser: illegal context for constraint (internal error)", NULL);
break;
default:
elog(ERROR, "parser: internal error; unrecognized constraint", NULL);
elog(ERROR, "parser: unrecognized constraint (internal error)", NULL);
break;
}
break;
default:
elog(ERROR, "parser: internal error; unrecognized node", NULL);
elog(ERROR, "parser: unrecognized node (internal error)", NULL);
}
elements = lnext(elements);
@ -684,7 +684,7 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
{
constraint = lfirst(dlist);
if (nodeTag(constraint) != T_Constraint)
elog(ERROR, "parser: internal error; unrecognized deferred node", NULL);
elog(ERROR, "parser: unrecognized deferred node (internal error)", NULL);
if (constraint->contype == CONSTR_PRIMARY)
{
@ -695,7 +695,7 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
have_pkey = TRUE;
}
else if (constraint->contype != CONSTR_UNIQUE)
elog(ERROR, "parser: internal error; unrecognized deferred constraint", NULL);
elog(ERROR, "parser: unrecognized deferred constraint (internal error)", NULL);
index = makeNode(IndexStmt);
@ -735,7 +735,7 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
columns = lnext(columns);
}
if (column == NULL)
elog(ERROR, "parser: column '%s' in key does not exist", key->name);
elog(ERROR, "CREATE TABLE column '%s' in key does not exist", key->name);
if (constraint->contype == CONSTR_PRIMARY)
column->is_not_null = TRUE;
@ -753,7 +753,7 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
}
if (index->idxname == NULL)
elog(ERROR, "parser: unable to construct implicit index for table %s"
elog(ERROR, "CREATE TABLE unable to construct implicit index for table %s"
"; name too long", stmt->relname);
else
elog(NOTICE, "CREATE TABLE/%s will create implicit index %s for table %s",
@ -918,8 +918,7 @@ transformSelectStmt(ParseState *pstate, SelectStmt *stmt)
/*
* The havingQual has a similar meaning as "qual" in the where
* statement. So we can easily use the code from the "where clause"
* with some additional traversals done in
* .../optimizer/plan/planner.c
* with some additional traversals done in optimizer/plan/planner.c
*/
qry->havingQual = transformWhereClause(pstate, stmt->havingClause);
@ -955,7 +954,7 @@ transformSelectStmt(ParseState *pstate, SelectStmt *stmt)
*/
if ((qry->hasAggs == false) && (qry->havingQual != NULL))
{
elog(ERROR, "This is not a valid having query!");
elog(ERROR, "SELECT/HAVING requires aggregates to be valid");
return (Query *) NIL;
}