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| author | Marko Mäkelä <marko.makela@mariadb.com> | 2018-11-06 16:24:16 +0200 |
|---|---|---|
| committer | Marko Mäkelä <marko.makela@mariadb.com> | 2018-11-06 16:24:16 +0200 |
| commit | 074c68409921032f8a64416cc4d5ebc35d95dca9 (patch) | |
| tree | 615c99d326fd2ce8c0e3b533b40f0e4e3475bbc1 /sql/sql_select.h | |
| parent | 563efeceece09154f71da6303244b1df36875428 (diff) | |
| parent | df563e0c037f9b2cdb22e145575f92a121b4b529 (diff) | |
| download | mariadb-git-074c68409921032f8a64416cc4d5ebc35d95dca9.tar.gz | |
Merge 10.3 into 10.4
Diffstat (limited to 'sql/sql_select.h')
| -rw-r--r-- | sql/sql_select.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sql/sql_select.h b/sql/sql_select.h index 4140a0293f8..e2c78473b1a 100644 --- a/sql/sql_select.h +++ b/sql/sql_select.h @@ -263,8 +263,12 @@ typedef struct st_join_table { /* Pointer to the associated ON expression. on_expr_ref=!NULL except for degenerate joins. - *on_expr_ref!=NULL for tables that are first inner tables within an outer - join. + + Optimization phase: *on_expr_ref!=NULL for tables that are the single + tables on the inner side of the outer join (t1 LEFT JOIN t2 ON...) + + Execution phase: *on_expr_ref!=NULL for tables that are first inner tables + within an outer join (which may have multiple tables) */ Item **on_expr_ref; COND_EQUAL *cond_equal; /**< multiple equalities for the on expression */ |