mirror of https://github.com/citusdata/citus.git
399b5738b0
This change fixes the problem with joins with VARCHAR columns. Prior to this change, when we tried to do large table joins on varchar columns, we got an error of the form: ERROR: cannot perform local joins that involve expressions DETAIL: local joins can be performed between columns only. This is because we have a check in CheckJoinBetweenColumns() which requires the join clause to have only 'Var' nodes (i.e. columns). Postgres adds a relabel t ype cast to cast the varchar to text; hence the type of the node is not T_Var and the join fails. The fix involves calling strip_implicit_coercions() to the left and right arguments so that RELABELTYPE is stripped to VAR. Fixes #76. |
||
|---|---|---|
| .. | ||
| backend | ||
| bin | ||
| include | ||
| test/regress | ||