diff options
Diffstat (limited to 'src/include/nodes/primnodes.h')
| -rw-r--r-- | src/include/nodes/primnodes.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h index 4f1d234d30..8f2c64847e 100644 --- a/src/include/nodes/primnodes.h +++ b/src/include/nodes/primnodes.h @@ -1143,6 +1143,22 @@ typedef struct CurrentOfExpr int cursor_param; /* refcursor parameter number, or 0 */ } CurrentOfExpr; +/* + * InferenceElem - an element of a unique index inference specification + * + * This mostly matches the structure of IndexElems, but having a dedicated + * primnode allows for a clean separation between the use of index parameters + * by utility commands, and this node. + */ +typedef struct InferenceElem +{ + Expr xpr; + Node *expr; /* expression to infer from, or NULL */ + Oid infercollid; /* OID of collation, or InvalidOid */ + Oid inferopfamily; /* OID of att opfamily, or InvalidOid */ + Oid inferopcinputtype; /* OID of att input type, or InvalidOid */ +} InferenceElem; + /*-------------------- * TargetEntry - * a target entry (used in query target lists) @@ -1307,4 +1323,30 @@ typedef struct FromExpr Node *quals; /* qualifiers on join, if any */ } FromExpr; +/*---------- + * OnConflictExpr - represents an ON CONFLICT DO ... expression + * + * The optimizer requires a list of inference elements, and optionally a WHERE + * clause to infer a unique index. The unique index (or, occasionally, + * indexes) inferred are used to arbitrate whether or not the alternative ON + * CONFLICT path is taken. + *---------- + */ +typedef struct OnConflictExpr +{ + NodeTag type; + OnConflictAction action; /* DO NOTHING or UPDATE? */ + + /* Arbiter */ + List *arbiterElems; /* unique index arbiter list (of InferenceElem's) */ + Node *arbiterWhere; /* unique index arbiter WHERE clause */ + Oid constraint; /* pg_constraint OID for arbiter */ + + /* ON CONFLICT UPDATE */ + List *onConflictSet; /* List of ON CONFLICT SET TargetEntrys */ + Node *onConflictWhere;/* qualifiers to restrict UPDATE to */ + int exclRelIndex; /* RT index of 'excluded' relation */ + List *exclRelTlist; /* tlist of the EXCLUDED pseudo relation */ +} OnConflictExpr; + #endif /* PRIMNODES_H */ |