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Indexing support for pattern matching operations via separate operator

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class when lc_collate is not C.
This commit is contained in:
Peter Eisentraut
2003-05-15 15:50:21 +00:00
parent 2a2f6cfa39
commit 2c0556068f
20 changed files with 489 additions and 208 deletions
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81
src/backend/optimizer/path/indxpath.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.137 2003/05/13 04:38:58 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.138 2003/05/15 15:50:18 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -1797,14 +1797,13 @@ match_special_index_operator(Expr *clause, Oid opclass,
case OID_VARCHAR_LIKE_OP:
case OID_NAME_LIKE_OP:
/* the right-hand const is type text for all of these */
if (locale_is_like_safe())
isIndexable = pattern_fixed_prefix(patt, Pattern_Type_Like,
&prefix, &rest) != Pattern_Prefix_None;
isIndexable = pattern_fixed_prefix(patt, Pattern_Type_Like,
&prefix, &rest) != Pattern_Prefix_None;
break;
case OID_BYTEA_LIKE_OP:
isIndexable = pattern_fixed_prefix(patt, Pattern_Type_Like,
&prefix, &rest) != Pattern_Prefix_None;
&prefix, &rest) != Pattern_Prefix_None;
break;
case OID_TEXT_ICLIKE_OP:
@ -1812,9 +1811,8 @@ match_special_index_operator(Expr *clause, Oid opclass,
case OID_VARCHAR_ICLIKE_OP:
case OID_NAME_ICLIKE_OP:
/* the right-hand const is type text for all of these */
if (locale_is_like_safe())
isIndexable = pattern_fixed_prefix(patt, Pattern_Type_Like_IC,
&prefix, &rest) != Pattern_Prefix_None;
isIndexable = pattern_fixed_prefix(patt, Pattern_Type_Like_IC,
&prefix, &rest) != Pattern_Prefix_None;
break;
case OID_TEXT_REGEXEQ_OP:
@ -1822,9 +1820,8 @@ match_special_index_operator(Expr *clause, Oid opclass,
case OID_VARCHAR_REGEXEQ_OP:
case OID_NAME_REGEXEQ_OP:
/* the right-hand const is type text for all of these */
if (locale_is_like_safe())
isIndexable = pattern_fixed_prefix(patt, Pattern_Type_Regex,
&prefix, &rest) != Pattern_Prefix_None;
isIndexable = pattern_fixed_prefix(patt, Pattern_Type_Regex,
&prefix, &rest) != Pattern_Prefix_None;
break;
case OID_TEXT_ICREGEXEQ_OP:
@ -1832,9 +1829,8 @@ match_special_index_operator(Expr *clause, Oid opclass,
case OID_VARCHAR_ICREGEXEQ_OP:
case OID_NAME_ICREGEXEQ_OP:
/* the right-hand const is type text for all of these */
if (locale_is_like_safe())
isIndexable = pattern_fixed_prefix(patt, Pattern_Type_Regex_IC,
&prefix, &rest) != Pattern_Prefix_None;
isIndexable = pattern_fixed_prefix(patt, Pattern_Type_Regex_IC,
&prefix, &rest) != Pattern_Prefix_None;
break;
case OID_INET_SUB_OP:
@ -1867,42 +1863,53 @@ match_special_index_operator(Expr *clause, Oid opclass,
case OID_TEXT_ICLIKE_OP:
case OID_TEXT_REGEXEQ_OP:
case OID_TEXT_ICREGEXEQ_OP:
if (!op_in_opclass(find_operator(">=", TEXTOID), opclass) ||
!op_in_opclass(find_operator("<", TEXTOID), opclass))
isIndexable = false;
if (lc_collate_is_c())
isIndexable = (op_in_opclass(find_operator(">=", TEXTOID), opclass)
&& op_in_opclass(find_operator("<", TEXTOID), opclass));
else
isIndexable = (op_in_opclass(find_operator("~>=~", TEXTOID), opclass)
&& op_in_opclass(find_operator("~<~", TEXTOID), opclass));
break;
case OID_BYTEA_LIKE_OP:
if (!op_in_opclass(find_operator(">=", BYTEAOID), opclass) ||
!op_in_opclass(find_operator("<", BYTEAOID), opclass))
isIndexable = false;
isIndexable = (op_in_opclass(find_operator(">=", BYTEAOID), opclass)
&& op_in_opclass(find_operator("<", BYTEAOID), opclass));
break;
case OID_BPCHAR_LIKE_OP:
case OID_BPCHAR_ICLIKE_OP:
case OID_BPCHAR_REGEXEQ_OP:
case OID_BPCHAR_ICREGEXEQ_OP:
if (!op_in_opclass(find_operator(">=", BPCHAROID), opclass) ||
!op_in_opclass(find_operator("<", BPCHAROID), opclass))
isIndexable = false;
if (lc_collate_is_c())
isIndexable = (op_in_opclass(find_operator(">=", BPCHAROID), opclass)
&& op_in_opclass(find_operator("<", BPCHAROID), opclass));
else
isIndexable = (op_in_opclass(find_operator("~>=~", BPCHAROID), opclass)
&& op_in_opclass(find_operator("~<~", BPCHAROID), opclass));
break;
case OID_VARCHAR_LIKE_OP:
case OID_VARCHAR_ICLIKE_OP:
case OID_VARCHAR_REGEXEQ_OP:
case OID_VARCHAR_ICREGEXEQ_OP:
if (!op_in_opclass(find_operator(">=", VARCHAROID), opclass) ||
!op_in_opclass(find_operator("<", VARCHAROID), opclass))
isIndexable = false;
if (lc_collate_is_c())
isIndexable = (op_in_opclass(find_operator(">=", VARCHAROID), opclass)
&& op_in_opclass(find_operator("<", VARCHAROID), opclass));
else
isIndexable = (op_in_opclass(find_operator("~>=~", VARCHAROID), opclass)
&& op_in_opclass(find_operator("~<~", VARCHAROID), opclass));
break;
case OID_NAME_LIKE_OP:
case OID_NAME_ICLIKE_OP:
case OID_NAME_REGEXEQ_OP:
case OID_NAME_ICREGEXEQ_OP:
if (!op_in_opclass(find_operator(">=", NAMEOID), opclass) ||
!op_in_opclass(find_operator("<", NAMEOID), opclass))
isIndexable = false;
if (lc_collate_is_c())
isIndexable = (op_in_opclass(find_operator(">=", NAMEOID), opclass)
&& op_in_opclass(find_operator("<", NAMEOID), opclass));
else
isIndexable = (op_in_opclass(find_operator("~>=~", NAMEOID), opclass)
&& op_in_opclass(find_operator("~<~", NAMEOID), opclass));
break;
case OID_INET_SUB_OP:
@ -2039,6 +2046,7 @@ prefix_quals(Node *leftop, Oid expr_op,
List *result;
Oid datatype;
Oid oproid;
const char *oprname;
char *prefix;
Const *con;
Expr *expr;
@ -2098,9 +2106,10 @@ prefix_quals(Node *leftop, Oid expr_op,
*/
if (pstatus == Pattern_Prefix_Exact)
{
oproid = find_operator("=", datatype);
oprname = (datatype == BYTEAOID || lc_collate_is_c() ? "=" : "~=~");
oproid = find_operator(oprname, datatype);
if (oproid == InvalidOid)
elog(ERROR, "prefix_quals: no = operator for type %u", datatype);
elog(ERROR, "prefix_quals: no operator %s for type %u", oprname, datatype);
con = string_to_const(prefix, datatype);
expr = make_opclause(oproid, BOOLOID, false,
(Expr *) leftop, (Expr *) con);
@ -2113,9 +2122,10 @@ prefix_quals(Node *leftop, Oid expr_op,
*
* We can always say "x >= prefix".
*/
oproid = find_operator(">=", datatype);
oprname = (datatype == BYTEAOID || lc_collate_is_c() ? ">=" : "~>=~");
oproid = find_operator(oprname, datatype);
if (oproid == InvalidOid)
elog(ERROR, "prefix_quals: no >= operator for type %u", datatype);
elog(ERROR, "prefix_quals: no operator %s for type %u", oprname, datatype);
con = string_to_const(prefix, datatype);
expr = make_opclause(oproid, BOOLOID, false,
(Expr *) leftop, (Expr *) con);
@ -2129,9 +2139,10 @@ prefix_quals(Node *leftop, Oid expr_op,
greaterstr = make_greater_string(con);
if (greaterstr)
{
oproid = find_operator("<", datatype);
oprname = (datatype == BYTEAOID || lc_collate_is_c() ? "<" : "~<~");
oproid = find_operator(oprname, datatype);
if (oproid == InvalidOid)
elog(ERROR, "prefix_quals: no < operator for type %u", datatype);
elog(ERROR, "prefix_quals: no operator %s for type %u", oprname, datatype);
expr = make_opclause(oproid, BOOLOID, false,
(Expr *) leftop, (Expr *) greaterstr);
result = lappend(result, expr);