diff options
| author | Fujii Masao | 2025-04-04 10:32:00 +0000 |
|---|---|---|
| committer | Fujii Masao | 2025-04-04 10:32:00 +0000 |
| commit | 534874fac0b34535c9a5ab9257d6574f78423578 (patch) | |
| tree | c92b33bfbd8fa96270cf5215047fb02030c022a6 /src/backend/commands | |
| parent | 9ef1851685b718264de47bf543505cf3ec25aaea (diff) | |
Allow "COPY table TO" command to copy rows from materialized views.
Previously, "COPY table TO" command worked only with plain tables and
did not support materialized views, even when they were populated and
had physical storage. To copy rows from materialized views,
"COPY (query) TO" command had to be used, instead.
This commit extends "COPY table TO" to support populated materialized
views directly, improving usability and performance, as "COPY table TO"
is generally faster than "COPY (query) TO". Note that copying from
unpopulated materialized views will still result in an error.
Author: jian he <[email protected]>
Reviewed-by: Kirill Reshke <[email protected]>
Reviewed-by: David G. Johnston <[email protected]>
Reviewed-by: Vignesh C <[email protected]>
Reviewed-by: Fujii Masao <[email protected]>
Discussion: https://postgr.es/m/CACJufxHVxnyRYy67hiPePNCPwVBMzhTQ6FaL9_Te5On9udG=yg@mail.gmail.com
Diffstat (limited to 'src/backend/commands')
| -rw-r--r-- | src/backend/commands/copyto.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/src/backend/commands/copyto.c b/src/backend/commands/copyto.c index 84a3f3879a8..f87e405351d 100644 --- a/src/backend/commands/copyto.c +++ b/src/backend/commands/copyto.c @@ -653,11 +653,14 @@ BeginCopyTo(ParseState *pstate, RelationGetRelationName(rel)), errhint("Try the COPY (SELECT ...) TO variant."))); else if (rel->rd_rel->relkind == RELKIND_MATVIEW) - ereport(ERROR, - (errcode(ERRCODE_WRONG_OBJECT_TYPE), - errmsg("cannot copy from materialized view \"%s\"", - RelationGetRelationName(rel)), - errhint("Try the COPY (SELECT ...) TO variant."))); + { + if (!RelationIsPopulated(rel)) + ereport(ERROR, + errcode(ERRCODE_FEATURE_NOT_SUPPORTED), + errmsg("cannot copy from unpopulated materialized view \"%s\"", + RelationGetRelationName(rel)), + errhint("Use the REFRESH MATERIALIZED VIEW command.")); + } else if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE) ereport(ERROR, (errcode(ERRCODE_WRONG_OBJECT_TYPE), |