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[BABEL] Adding hook to enable index matching through type casts #774

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[BABEL] Adding hook to enable index matching through type casts #774

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16 changes: 14 additions & 2 deletions src/backend/optimizer/path/indxpath.c
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,8 @@
#include "utils/lsyscache.h"
#include "utils/selfuncs.h"

/* Hook for extensions to provide index clauses for unmatched OpExpr */
match_opclause_to_indexcol_hook_type match_opclause_to_indexcol_hook = NULL;

/* XXX see PartCollMatchesExprColl */
#define IndexCollMatchesExprColl(idxcollation, exprcollation) \
Expand Down Expand Up @@ -2451,12 +2453,17 @@ match_opclause_to_indexcol(PlannerInfo *root,
* function for the operator's underlying function.
*/
set_opfuncid(clause); /* make sure we have opfuncid */
return get_index_clause_from_support(root,
iclause = get_index_clause_from_support(root,
rinfo,
clause->opfuncid,
0, /* indexarg on left */
indexcol,
index);
if (iclause)
return iclause;
if (match_opclause_to_indexcol_hook)
return match_opclause_to_indexcol_hook(root, rinfo, indexcol, index);
return NULL;
}

if (match_index_to_operand(rightop, indexcol, index) &&
Expand Down Expand Up @@ -2491,12 +2498,17 @@ match_opclause_to_indexcol(PlannerInfo *root,
* function for the operator's underlying function.
*/
set_opfuncid(clause); /* make sure we have opfuncid */
return get_index_clause_from_support(root,
iclause = get_index_clause_from_support(root,
rinfo,
clause->opfuncid,
1, /* indexarg on right */
indexcol,
index);
if (iclause)
return iclause;
if (match_opclause_to_indexcol_hook)
return match_opclause_to_indexcol_hook(root, rinfo, indexcol, index);
return NULL;
}

return NULL;
Expand Down
7 changes: 7 additions & 0 deletions src/include/optimizer/paths.h
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,13 @@ typedef RelOptInfo *(*join_search_hook_type) (PlannerInfo *root,
List *initial_rels);
extern PGDLLIMPORT join_search_hook_type join_search_hook;

/* Hook for plugins to provide index clauses for unmatched OpExpr */
typedef IndexClause *(*match_opclause_to_indexcol_hook_type) (PlannerInfo *root,
RestrictInfo *rinfo,
int indexcol,
IndexOptInfo *index);
extern PGDLLIMPORT match_opclause_to_indexcol_hook_type match_opclause_to_indexcol_hook;


extern RelOptInfo *make_one_rel(PlannerInfo *root, List *joinlist);
extern RelOptInfo *standard_join_search(PlannerInfo *root, int levels_needed,
Expand Down
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