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| author | Peter Eisentraut <peter@eisentraut.org> | 2019-03-30 08:13:09 +0100 |
|---|---|---|
| committer | Peter Eisentraut <peter@eisentraut.org> | 2019-03-30 08:15:57 +0100 |
| commit | fc22b6623b6b3bab3cb057ccd282c2bfad1a0b30 (patch) | |
| tree | cda5092955ece5d547d5517ed56a3d480f199d25 /src/backend/nodes/outfuncs.c | |
| parent | 6b8b5364ddd0e4d882562615c6b6c28638ade9f2 (diff) | |
Generated columns
This is an SQL-standard feature that allows creating columns that are
computed from expressions rather than assigned, similar to a view or
materialized view but on a column basis.
This implements one kind of generated column: stored (computed on
write). Another kind, virtual (computed on read), is planned for the
future, and some room is left for it.
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/b151f851-4019-bdb1-699e-ebab07d2f40a@2ndquadrant.com
Diffstat (limited to 'src/backend/nodes/outfuncs.c')
| -rw-r--r-- | src/backend/nodes/outfuncs.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c index 910a738c205..3282be0e4bd 100644 --- a/src/backend/nodes/outfuncs.c +++ b/src/backend/nodes/outfuncs.c @@ -2792,6 +2792,7 @@ _outColumnDef(StringInfo str, const ColumnDef *node) WRITE_NODE_FIELD(cooked_default); WRITE_CHAR_FIELD(identity); WRITE_NODE_FIELD(identitySequence); + WRITE_CHAR_FIELD(generated); WRITE_NODE_FIELD(collClause); WRITE_OID_FIELD(collOid); WRITE_NODE_FIELD(constraints); @@ -3096,6 +3097,7 @@ _outRangeTblEntry(StringInfo str, const RangeTblEntry *node) WRITE_BITMAPSET_FIELD(selectedCols); WRITE_BITMAPSET_FIELD(insertedCols); WRITE_BITMAPSET_FIELD(updatedCols); + WRITE_BITMAPSET_FIELD(extraUpdatedCols); WRITE_NODE_FIELD(securityQuals); } @@ -3467,6 +3469,13 @@ _outConstraint(StringInfo str, const Constraint *node) WRITE_CHAR_FIELD(generated_when); break; + case CONSTR_GENERATED: + appendStringInfoString(str, "GENERATED"); + WRITE_NODE_FIELD(raw_expr); + WRITE_STRING_FIELD(cooked_expr); + WRITE_CHAR_FIELD(generated_when); + break; + case CONSTR_CHECK: appendStringInfoString(str, "CHECK"); WRITE_BOOL_FIELD(is_no_inherit); |