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Commit2d2d06b

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Apply identity sequence values on COPY
A COPY into a table should apply identity sequence values just like itdoes for ordinary defaults. This was previously forgotten, leading tonull values being inserted, which in turn would fail because identitycolumns have not-null constraints.Author: Michael Paquier <michael.paquier@gmail.com>Reported-by: Steven Winfield <steven.winfield@cantabcapital.com>Bug: #14952
1 parent0a3edbb commit2d2d06b

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3 files changed

+44
-2
lines changed

3 files changed

+44
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‎src/backend/commands/copy.c

Lines changed: 14 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -23,6 +23,7 @@
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#include"access/sysattr.h"
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#include"access/xact.h"
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#include"access/xlog.h"
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#include"catalog/dependency.h"
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#include"catalog/pg_type.h"
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#include"commands/copy.h"
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#include"commands/defrem.h"
@@ -3067,8 +3068,19 @@ BeginCopyFrom(ParseState *pstate,
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{
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/* attribute is NOT to be copied from input */
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/* use default value if one exists */
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Expr*defexpr= (Expr*)build_column_default(cstate->rel,
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attnum);
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Expr*defexpr;
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if (att->attidentity)
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{
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NextValueExpr*nve=makeNode(NextValueExpr);
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nve->seqid=getOwnedSequence(RelationGetRelid(cstate->rel),
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attnum);
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nve->typeId=att->atttypid;
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defexpr= (Expr*)nve;
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}
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else
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defexpr= (Expr*)build_column_default(cstate->rel,attnum);
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if (defexpr!=NULL)
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{

‎src/test/regress/expected/identity.out

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Original file line numberDiff line numberDiff line change
@@ -153,6 +153,19 @@ SELECT * FROM itest2;
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3 |
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(3 rows)
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-- COPY tests
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CREATE TABLE itest9 (a int GENERATED ALWAYS AS IDENTITY, b text, c bigint);
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COPY itest9 FROM stdin;
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COPY itest9 (b, c) FROM stdin;
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SELECT * FROM itest9 ORDER BY c;
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a | b | c
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-----+------+-----
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100 | foo | 200
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101 | bar | 201
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1 | foo2 | 202
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2 | bar2 | 203
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(4 rows)
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-- DROP IDENTITY tests
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ALTER TABLE itest4 ALTER COLUMN a DROP IDENTITY;
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ALTER TABLE itest4 ALTER COLUMN a DROP IDENTITY; -- error

‎src/test/regress/sql/identity.sql

Lines changed: 17 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -78,6 +78,23 @@ UPDATE itest2 SET a = DEFAULT WHERE a = 2;
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SELECT*FROM itest2;
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-- COPY tests
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CREATETABLEitest9 (aint GENERATED ALWAYSAS IDENTITY, btext, cbigint);
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COPY itest9FROM stdin;
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100foo200
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101bar201
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\.
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COPY itest9 (b, c)FROM stdin;
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foo2202
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bar2203
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\.
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SELECT*FROM itest9ORDER BY c;
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-- DROP IDENTITY tests
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ALTERTABLE itest4 ALTER COLUMN a DROP IDENTITY;

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