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Extend COPY to support COPY (SELECT ...) TO ...

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Bernd Helmle
This commit is contained in:
Tom Lane
2006-08-30 23:34:22 +00:00
parent 0d5065781d
commit 85188ab883
16 changed files with 854 additions and 339 deletions
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15
src/backend/parser/analyze.c
View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.348 2006/08/25 04:06:51 tgl Exp $
* $PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.349 2006/08/30 23:34:21 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -341,6 +341,19 @@ transformStmt(ParseState *pstate, Node *parseTree,
}
break;
case T_CopyStmt:
{
CopyStmt *n = (CopyStmt *) parseTree;
result = makeNode(Query);
result->commandType = CMD_UTILITY;
if (n->query)
n->query = transformStmt(pstate, (Node *) n->query,
extras_before, extras_after);
result->utilityStmt = (Node *) parseTree;
}
break;
case T_AlterTableStmt:
result = transformAlterTableStmt(pstate,
(AlterTableStmt *) parseTree,

23
src/backend/parser/gram.y
View File

@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.558 2006/08/25 04:06:51 tgl Exp $
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.559 2006/08/30 23:34:21 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -1614,11 +1614,15 @@ ClosePortalStmt:
/*****************************************************************************
*
* QUERY :
* COPY <relname> ['(' columnList ')'] FROM/TO [WITH options]
* COPY relname ['(' columnList ')'] FROM/TO file [WITH options]
*
* BINARY, OIDS, and DELIMITERS kept in old locations
* for backward compatibility. 2002-06-18
*
* COPY ( SELECT ... ) TO file [WITH options]
* This form doesn't have the backwards-compatible option
* syntax.
*
*****************************************************************************/
CopyStmt: COPY opt_binary qualified_name opt_column_list opt_oids
@ -1626,6 +1630,7 @@ CopyStmt: COPY opt_binary qualified_name opt_column_list opt_oids
{
CopyStmt *n = makeNode(CopyStmt);
n->relation = $3;
n->query = NULL;
n->attlist = $4;
n->is_from = $6;
n->filename = $7;
@ -1642,6 +1647,18 @@ CopyStmt: COPY opt_binary qualified_name opt_column_list opt_oids
n->options = list_concat(n->options, $10);
$$ = (Node *)n;
}
| COPY select_with_parens TO copy_file_name opt_with
copy_opt_list
{
CopyStmt *n = makeNode(CopyStmt);
n->relation = NULL;
n->query = (Query *) $2;
n->attlist = NIL;
n->is_from = false;
n->filename = $4;
n->options = $6;
$$ = (Node *)n;
}
;
copy_from:
@ -1652,7 +1669,7 @@ copy_from:
/*
* copy_file_name NULL indicates stdio is used. Whether stdin or stdout is
* used depends on the direction. (It really doesn't make sense to copy from
* stdout. We silently correct the "typo". - AY 9/94
* stdout. We silently correct the "typo".) - AY 9/94
*/
copy_file_name:
Sconst { $$ = $1; }