diff options
Diffstat (limited to 'src/include/rewrite/rewriteManip.h')
| -rw-r--r-- | src/include/rewrite/rewriteManip.h | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/src/include/rewrite/rewriteManip.h b/src/include/rewrite/rewriteManip.h index 51993f3a78b..8247028f21b 100644 --- a/src/include/rewrite/rewriteManip.h +++ b/src/include/rewrite/rewriteManip.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/rewrite/rewriteManip.h,v 1.50 2009/06/11 14:49:12 momjian Exp $ + * $PostgreSQL: pgsql/src/include/rewrite/rewriteManip.h,v 1.50.2.1 2009/09/02 17:52:33 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -17,6 +17,21 @@ #include "nodes/parsenodes.h" +typedef struct replace_rte_variables_context replace_rte_variables_context; + +typedef Node * (*replace_rte_variables_callback) (Var *var, + replace_rte_variables_context *context); + +struct replace_rte_variables_context +{ + replace_rte_variables_callback callback; /* callback function */ + void *callback_arg; /* context data for callback function */ + int target_varno; /* RTE index to search for */ + int sublevels_up; /* (current) nesting depth */ + bool inserted_sublink; /* have we inserted a SubLink? */ +}; + + extern void OffsetVarNodes(Node *node, int offset, int sublevels_up); extern void ChangeVarNodes(Node *node, int old_varno, int new_varno, int sublevels_up); @@ -42,8 +57,17 @@ extern bool checkExprHasAggs(Node *node); extern bool checkExprHasWindowFuncs(Node *node); extern bool checkExprHasSubLink(Node *node); +extern Node *replace_rte_variables(Node *node, + int target_varno, int sublevels_up, + replace_rte_variables_callback callback, + void *callback_arg, + bool *outer_hasSubLinks); +extern Node *replace_rte_variables_mutator(Node *node, + replace_rte_variables_context *context); + extern Node *ResolveNew(Node *node, int target_varno, int sublevels_up, RangeTblEntry *target_rte, - List *targetlist, int event, int update_varno); + List *targetlist, int event, int update_varno, + bool *outer_hasSubLinks); #endif /* REWRITEMANIP_H */ |