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postgres_fdw: Refactor deparsing code for locking clauses.

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The upcoming patch to allow join pushdown in postgres_fdw needs to use
this code multiple times, which requires moving it to deparse.c.  That
seems like a good idea anyway, so do that now both on general principle
and to simplify the future patch.

Inspired by a patch by Shigeru Hanada and Ashutosh Bapat, but I did
it a little differently than what that patch did.
This commit is contained in:
Robert Haas
2016-01-28 16:44:01 -05:00
parent fbe5a3fb73
commit b88ef201d4
3 changed files with 64 additions and 49 deletions
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2
contrib/postgres_fdw/postgres_fdw.h
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@ -88,6 +88,8 @@ extern void deparseSelectSql(StringInfo buf,
RelOptInfo *baserel,
Bitmapset *attrs_used,
List **retrieved_attrs);
extern void deparseLockingClause(StringInfo buf,
PlannerInfo *root, RelOptInfo *rel);
extern void appendWhereClause(StringInfo buf,
PlannerInfo *root,
RelOptInfo *baserel,