diff options
Diffstat (limited to 'src/include/nodes/primnodes.h')
| -rw-r--r-- | src/include/nodes/primnodes.h | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h index 12af0fd0925..3756e443ff7 100644 --- a/src/include/nodes/primnodes.h +++ b/src/include/nodes/primnodes.h @@ -10,7 +10,7 @@ * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: primnodes.h,v 1.83 2003/06/06 15:04:03 tgl Exp $ + * $Id: primnodes.h,v 1.84 2003/06/24 23:14:48 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -226,6 +226,7 @@ typedef struct Aggref Index agglevelsup; /* > 0 if agg belongs to outer query */ bool aggstar; /* TRUE if argument was really '*' */ bool aggdistinct; /* TRUE if it's agg(DISTINCT ...) */ + List *args; /* arguments to the aggregate */ } Aggref; /* ---------------- @@ -358,15 +359,19 @@ typedef struct BoolExpr /* ---------------- * SubLink * - * A SubLink represents a subselect appearing in an expression, and in some - * cases also the combining operator(s) just above it. The subLinkType - * indicates the form of the expression represented: + * A SubLink represents a subselect, or an expression, appearing in an + * expression, and in some cases also the combining operator(s) just above + * it. The subLinkType indicates the form of the expression represented: * EXISTS_SUBLINK EXISTS(SELECT ...) * ALL_SUBLINK (lefthand) op ALL (SELECT ...) * ANY_SUBLINK (lefthand) op ANY (SELECT ...) * MULTIEXPR_SUBLINK (lefthand) op (SELECT ...) * EXPR_SUBLINK (SELECT with single targetlist item ...) * ARRAY_SUBLINK ARRAY(SELECT with single targetlist item ...) + * If an expression is used in place of the subselect, it is transformed + * into a simple "(SELECT expr)" in gram.y. This is to allow arrays to be + * used as if they were the result of a single column subselect. If the + * expression is scalar, it is treated as a one element array. * For ALL, ANY, and MULTIEXPR, the lefthand is a list of expressions of the * same length as the subselect's targetlist. MULTIEXPR will *always* have * a list with more than one entry; if the subselect has just one target @@ -415,6 +420,8 @@ typedef struct SubLink SubLinkType subLinkType; /* EXISTS, ALL, ANY, MULTIEXPR, EXPR */ bool useOr; /* TRUE to combine column results with * "OR" not "AND" */ + bool isExpr; /* TRUE if the subselect is really derived + * from a single expression */ List *lefthand; /* list of outer-query expressions on the * left */ List *operName; /* originally specified operator name */ @@ -456,6 +463,15 @@ typedef struct SubPlan SubLinkType subLinkType; /* EXISTS, ALL, ANY, MULTIEXPR, EXPR */ bool useOr; /* TRUE to combine column results with * "OR" not "AND" */ + bool isExpr; /* TRUE if the subselect is really derived + * from a single expression */ + /* runtime cache for single array expressions */ + Oid exprtype; /* array and element type, and other info + * needed deconstruct the array */ + Oid elemtype; + int16 elmlen; + bool elmbyval; + char elmalign; /* The combining operators, transformed to executable expressions: */ List *exprs; /* list of OpExpr expression trees */ List *paramIds; /* IDs of Params embedded in the above */ |