diff options
Diffstat (limited to 'src/include/parser/parse_relation.h')
| -rw-r--r-- | src/include/parser/parse_relation.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/src/include/parser/parse_relation.h b/src/include/parser/parse_relation.h index fc0a2577f31..9dc0d5846b0 100644 --- a/src/include/parser/parse_relation.h +++ b/src/include/parser/parse_relation.h @@ -16,6 +16,24 @@ #include "parser/parse_node.h" + +/* + * Support for fuzzily matching column. + * + * This is for building diagnostic messages, where non-exact matching + * attributes are suggested to the user. The struct's fields may be facets of + * a particular RTE, or of an entire range table, depending on context. + */ +typedef struct +{ + int distance; /* Weighted distance (lowest so far) */ + RangeTblEntry *rfirst; /* RTE of first */ + AttrNumber first; /* Closest attribute so far */ + RangeTblEntry *rsecond; /* RTE of second */ + AttrNumber second; /* Second closest attribute so far */ +} FuzzyAttrMatchState; + + extern RangeTblEntry *refnameRangeTblEntry(ParseState *pstate, const char *schemaname, const char *refname, @@ -35,7 +53,8 @@ extern RangeTblEntry *GetRTEByRangeTablePosn(ParseState *pstate, extern CommonTableExpr *GetCTEForRTE(ParseState *pstate, RangeTblEntry *rte, int rtelevelsup); extern Node *scanRTEForColumn(ParseState *pstate, RangeTblEntry *rte, - char *colname, int location); + char *colname, int location, + int fuzzy_rte_penalty, FuzzyAttrMatchState *fuzzystate); extern Node *colNameToVar(ParseState *pstate, char *colname, bool localonly, int location); extern void markVarForSelectPriv(ParseState *pstate, Var *var, |