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Fix ALTER TABLE...SET STATS error message for included columns

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The existing error message was complaining that the column is not an
expression, which is not correct.  Introduce a suitable wording
variation and a test.

Co-authored-by: Yugo Nagata <nagata@sraoss.co.jp>
Discussion: https://postgr.es/m/20180628182803.e4632d5a.nagata@sraoss.co.jp
Reviewed-by: Álvaro Herrera <alvherre@alvh.no-ip.org>
This commit is contained in:
Alvaro Herrera 2018-07-16 20:00:24 -04:00
parent e353389d24
commit cb9db2ab06
3 changed files with 39 additions and 8 deletions
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23
src/backend/commands/tablecmds.c
View File

@ -6504,14 +6504,21 @@ ATExecSetStatistics(Relation rel, const char *colName, int16 colNum, Node *newVa
errmsg("cannot alter system column \"%s\"",
colName)));
if ((rel->rd_rel->relkind == RELKIND_INDEX ||
rel->rd_rel->relkind == RELKIND_PARTITIONED_INDEX) &&
rel->rd_index->indkey.values[attnum - 1] != 0)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot alter statistics on non-expression column \"%s\" of index \"%s\"",
NameStr(attrtuple->attname), RelationGetRelationName(rel)),
errhint("Alter statistics on table column instead.")));
if (rel->rd_rel->relkind == RELKIND_INDEX ||
rel->rd_rel->relkind == RELKIND_PARTITIONED_INDEX)
{
if (attnum > rel->rd_index->indnkeyatts)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot alter statistics on included column \"%s\" of index \"%s\"",
NameStr(attrtuple->attname), RelationGetRelationName(rel))));
else if (rel->rd_index->indkey.values[attnum - 1] != 0)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot alter statistics on non-expression column \"%s\" of index \"%s\"",
NameStr(attrtuple->attname), RelationGetRelationName(rel)),
errhint("Alter statistics on table column instead.")));
}
attrtuple->attstattarget = newtarget;

14
src/test/regress/expected/index_including.out
View File

@ -243,6 +243,20 @@ SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
----------
(0 rows)
DROP TABLE tbl;
/*
* 3.3 Test ALTER TABLE SET STATISTICS
*/
CREATE TABLE tbl (c1 int, c2 int);
CREATE INDEX tbl_idx ON tbl (c1, (c1+0)) INCLUDE (c2);
ALTER INDEX tbl_idx ALTER COLUMN 1 SET STATISTICS 1000;
ERROR: cannot alter statistics on non-expression column "c1" of index "tbl_idx"
HINT: Alter statistics on table column instead.
ALTER INDEX tbl_idx ALTER COLUMN 2 SET STATISTICS 1000;
ALTER INDEX tbl_idx ALTER COLUMN 3 SET STATISTICS 1000;
ERROR: cannot alter statistics on included column "c2" of index "tbl_idx"
ALTER INDEX tbl_idx ALTER COLUMN 4 SET STATISTICS 1000;
ERROR: column number 4 of relation "tbl_idx" does not exist
DROP TABLE tbl;
/*
* 4. CREATE INDEX CONCURRENTLY

10
src/test/regress/sql/index_including.sql
View File

@ -137,6 +137,16 @@ ALTER TABLE tbl DROP COLUMN c1;
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
DROP TABLE tbl;
/*
* 3.3 Test ALTER TABLE SET STATISTICS
*/
CREATE TABLE tbl (c1 int, c2 int);
CREATE INDEX tbl_idx ON tbl (c1, (c1+0)) INCLUDE (c2);
ALTER INDEX tbl_idx ALTER COLUMN 1 SET STATISTICS 1000;
ALTER INDEX tbl_idx ALTER COLUMN 2 SET STATISTICS 1000;
ALTER INDEX tbl_idx ALTER COLUMN 3 SET STATISTICS 1000;
ALTER INDEX tbl_idx ALTER COLUMN 4 SET STATISTICS 1000;
DROP TABLE tbl;
/*
* 4. CREATE INDEX CONCURRENTLY