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Implement an API to let foreign-data wrappers actually be functional.

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This commit provides the core code and documentation needed.  A contrib
module test case will follow shortly.

Shigeru Hanada, Jan Urbanski, Heikki Linnakangas
This commit is contained in:
Tom Lane
2011-02-20 00:17:18 -05:00
parent d5813488a4
commit bb74240794
39 changed files with 1202 additions and 62 deletions
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7
src/backend/executor/execMain.c
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@ -738,6 +738,13 @@ InitPlan(QueryDesc *queryDesc, int eflags)
break;
}
/* if foreign table, tuples can't be locked */
if (relation && relation->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("SELECT FOR UPDATE/SHARE cannot be used with foreign table \"%s\"",
RelationGetRelationName(relation))));
erm = (ExecRowMark *) palloc(sizeof(ExecRowMark));
erm->relation = relation;
erm->rti = rc->rti;