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Fix problem with | in ~ comparison using index.

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This commit is contained in:
Bruce Momjian 1999-05-21 04:40:04 +00:00
parent a1d9186067
commit 56b9a549c7
1 changed files with 52 additions and 35 deletions
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87
src/backend/parser/gram.y
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.79 1999/05/20 12:12:55 wieck Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.80 1999/05/21 04:40:04 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -5347,7 +5347,7 @@ mapTargetColumns(List *src, List *dst)
static Node *makeIndexable(char *opname, Node *lexpr, Node *rexpr)
{
Node *result = NULL;
/* we do this so indexes can be used */
if (strcmp(opname,"~") == 0 ||
strcmp(opname,"~*") == 0)
@ -5360,47 +5360,64 @@ static Node *makeIndexable(char *opname, Node *lexpr, Node *rexpr)
char *match_least = palloc(strlen(n->val.val.str)+2);
char *match_most = palloc(strlen(n->val.val.str)+2);
int pos, match_pos=0;
bool found_pipe = false;
/* skip leading ^ */
for (pos = 1; n->val.val.str[pos]; pos++)
{
if (n->val.val.str[pos] == '.' ||
n->val.val.str[pos] == '?' ||
n->val.val.str[pos] == '*' ||
n->val.val.str[pos] == '[' ||
n->val.val.str[pos] == '$' ||
(strcmp(opname,"~*") == 0 && isalpha(n->val.val.str[pos])))
break;
if (n->val.val.str[pos] == '|')
{
found_pipe = true;
break;
}
if (n->val.val.str[pos] == '\\')
pos++;
match_least[match_pos] = n->val.val.str[pos];
match_most[match_pos++] = n->val.val.str[pos];
}
if (match_pos != 0)
/* skip leading ^ */
if (!found_pipe)
{
A_Const *least = makeNode(A_Const);
A_Const *most = makeNode(A_Const);
/* make strings to be used in index use */
match_least[match_pos] = '\0';
match_most[match_pos] = '\377';
match_most[match_pos+1] = '\0';
least->val.type = T_String;
least->val.val.str = match_least;
most->val.type = T_String;
most->val.val.str = match_most;
for (pos = 1; n->val.val.str[pos]; pos++)
{
if (n->val.val.str[pos] == '.' ||
n->val.val.str[pos] == '?' ||
n->val.val.str[pos] == '*' ||
n->val.val.str[pos] == '[' ||
n->val.val.str[pos] == '$' ||
(strcmp(opname,"~*") == 0 && isalpha(n->val.val.str[pos])))
break;
if (n->val.val.str[pos] == '\\')
pos++;
if (n->val.val.str[pos] == '\0')
break;
match_least[match_pos] = n->val.val.str[pos];
match_most[match_pos++] = n->val.val.str[pos];
}
if (match_pos != 0)
{
A_Const *least = makeNode(A_Const);
A_Const *most = makeNode(A_Const);
/* make strings to be used in index use */
match_least[match_pos] = '\0';
match_most[match_pos] = '\377';
match_most[match_pos+1] = '\0';
least->val.type = T_String;
least->val.val.str = match_least;
most->val.type = T_String;
most->val.val.str = match_most;
#ifdef USE_LOCALE
result = makeA_Expr(AND, NULL,
makeA_Expr(OP, "~", lexpr, rexpr),
makeA_Expr(OP, ">=", lexpr, (Node *)least));
result = makeA_Expr(AND, NULL,
makeA_Expr(OP, "~", lexpr, rexpr),
makeA_Expr(OP, ">=", lexpr, (Node *)least));
#else
result = makeA_Expr(AND, NULL,
makeA_Expr(OP, "~", lexpr, rexpr),
makeA_Expr(AND, NULL,
makeA_Expr(OP, ">=", lexpr, (Node *)least),
makeA_Expr(OP, "<=", lexpr, (Node *)most)));
result = makeA_Expr(AND, NULL,
makeA_Expr(OP, "~", lexpr, rexpr),
makeA_Expr(AND, NULL,
makeA_Expr(OP, ">=", lexpr, (Node *)least),
makeA_Expr(OP, "<=", lexpr, (Node *)most)));
#endif
}
}
}
}
@ -5420,9 +5437,9 @@ static Node *makeIndexable(char *opname, Node *lexpr, Node *rexpr)
n->val.val.str[pos+1] != '%')
break;
if(n->val.val.str[pos] == '_')
break;
if (n->val.val.str[pos] == '\\' ||
n->val.val.str[pos] == '%')
break;
if (n->val.val.str[pos] == '\\' ||
n->val.val.str[pos+1] == '%')
pos++;
if (n->val.val.str[pos] == '\0')
break;