diff options
Diffstat (limited to 'src/include/nodes/plannodes.h')
| -rw-r--r-- | src/include/nodes/plannodes.h | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/src/include/nodes/plannodes.h b/src/include/nodes/plannodes.h index 44002a9d45d..c9aa190b33d 100644 --- a/src/include/nodes/plannodes.h +++ b/src/include/nodes/plannodes.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/nodes/plannodes.h,v 1.88 2007/01/09 02:14:15 tgl Exp $ + * $PostgreSQL: pgsql/src/include/nodes/plannodes.h,v 1.89 2007/01/10 18:06:04 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -346,14 +346,23 @@ typedef struct NestLoop /* ---------------- * merge join node + * + * The expected ordering of each mergeable column is described by a btree + * opfamily OID, a direction (BTLessStrategyNumber or BTGreaterStrategyNumber) + * and a nulls-first flag. Note that the two sides of each mergeclause may + * be of different datatypes, but they are ordered the same way according to + * the common opfamily. The operator in each mergeclause must be an equality + * operator of the indicated opfamily. * ---------------- */ typedef struct MergeJoin { Join join; List *mergeclauses; /* mergeclauses as expression trees */ - List *mergefamilies; /* OID list of btree opfamilies */ - List *mergestrategies; /* integer list of btree strategies */ + /* these are arrays, but have the same length as the mergeclauses list: */ + Oid *mergeFamilies; /* per-clause OIDs of btree opfamilies */ + int *mergeStrategies; /* per-clause ordering (ASC or DESC) */ + bool *mergeNullsFirst; /* per-clause nulls ordering */ } MergeJoin; /* ---------------- @@ -399,6 +408,7 @@ typedef struct Group Plan plan; int numCols; /* number of grouping columns */ AttrNumber *grpColIdx; /* their indexes in the target list */ + Oid *grpOperators; /* equality operators to compare with */ } Group; /* --------------- @@ -428,6 +438,7 @@ typedef struct Agg AggStrategy aggstrategy; int numCols; /* number of grouping columns */ AttrNumber *grpColIdx; /* their indexes in the target list */ + Oid *grpOperators; /* equality operators to compare with */ long numGroups; /* estimated number of groups in input */ } Agg; @@ -439,7 +450,8 @@ typedef struct Unique { Plan plan; int numCols; /* number of columns to check for uniqueness */ - AttrNumber *uniqColIdx; /* indexes into the target list */ + AttrNumber *uniqColIdx; /* their indexes in the target list */ + Oid *uniqOperators; /* equality operators to compare with */ } Unique; /* ---------------- @@ -470,8 +482,9 @@ typedef struct SetOp SetOpCmd cmd; /* what to do */ int numCols; /* number of columns to check for * duplicate-ness */ - AttrNumber *dupColIdx; /* indexes into the target list */ - AttrNumber flagColIdx; + AttrNumber *dupColIdx; /* their indexes in the target list */ + Oid *dupOperators; /* equality operators to compare with */ + AttrNumber flagColIdx; /* where is the flag column, if any */ } SetOp; /* ---------------- |