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Fix support for CREATE TABLE IF NOT EXISTS AS EXECUTE

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The grammar IF NOT EXISTS for CTAS is supported since 9.5 and documented
as such, however the case of using EXECUTE as query has never been
covered as EXECUTE CTAS statements and normal CTAS statements are parsed
separately.

Author: Andreas Karlsson
Discussion: https://postgr.es/m/2ddcc188-e37c-a0be-32bf-a56b07c3559e@proxel.se
Backpatch-through: 9.5
This commit is contained in:
Michael Paquier
2019-02-15 17:12:24 +09:00
parent 6c0fb94189
commit 331a613e9d
3 changed files with 40 additions and 0 deletions
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18
src/backend/parser/gram.y
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@ -10700,11 +10700,29 @@ ExecuteStmt: EXECUTE name execute_param_clause
ctas->into = $4;
ctas->relkind = OBJECT_TABLE;
ctas->is_select_into = false;
ctas->if_not_exists = false;
/* cram additional flags into the IntoClause */
$4->rel->relpersistence = $2;
$4->skipData = !($9);
$$ = (Node *) ctas;
}
| CREATE OptTemp TABLE IF_P NOT EXISTS create_as_target AS
EXECUTE name execute_param_clause opt_with_data
{
CreateTableAsStmt *ctas = makeNode(CreateTableAsStmt);
ExecuteStmt *n = makeNode(ExecuteStmt);
n->name = $10;
n->params = $11;
ctas->query = (Node *) n;
ctas->into = $7;
ctas->relkind = OBJECT_TABLE;
ctas->is_select_into = false;
ctas->if_not_exists = true;
/* cram additional flags into the IntoClause */
$7->rel->relpersistence = $2;
$7->skipData = !($12);
$$ = (Node *) ctas;
}
;
execute_param_clause: '(' expr_list ')' { $$ = $2; }