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Added/augmented functions: decode/regexp_count/regexp_instr/regexp_replace/regexp_subst

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dengxuyue
2022-07-09 15:02:16 +08:00
committed by dengxuyue
parent f65486ba95
commit a038ba49eb
22 changed files with 8047 additions and 91 deletions
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18
src/common/backend/parser/parse_expr.cpp
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@ -1634,12 +1634,28 @@ static Node* transformCaseExpr(ParseState* pstate, CaseExpr* c)
}
newc->defresult = (Expr*)transformExpr(pstate, defresult);
/* check results in resultexprs and defresult whether all are in the whitelist. */
List* defresultexprs = NIL;
defresultexprs = lappend(defresultexprs, newc->defresult);
bool allInWhitelist = check_all_in_whitelist(resultexprs) && check_all_in_whitelist(defresultexprs);
list_free_ext(defresultexprs);
/*
* Note: default result is considered the most significant type in
* determining preferred type. This is how the code worked before, but it
* seems a little bogus to me --- tgl
*
* For A format, result1 is considered the most significant type in
* determining preferred type. So append default result to the end of
* the list. Make sure result1 is the first element of the list.
*/
resultexprs = lcons(newc->defresult, resultexprs);
if (u_sess->attr.attr_sql.sql_compatibility == A_FORMAT &&
ENABLE_SQL_BETA_FEATURE(A_STYLE_COERCE) && allInWhitelist) {
resultexprs = lappend(resultexprs, newc->defresult);
} else {
resultexprs = lcons(newc->defresult, resultexprs);
}
ptype = select_common_type(pstate, resultexprs, "CASE", NULL);
AssertEreport(OidIsValid(ptype), MOD_OPT, "");