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Postgres FD Implementation
Commit 49d3d9cf authored by Bruce Momjian's avatar Bruce Momjian
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Change COPY CSV keyword to be: 

	FORCE QUOTE to force quotes
	FORCE NOT NULL to quote null input values
parent 2d1221bf
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Showing with 135 additions and 132 deletions
doc/src/sgml/ref/copy.sgml
View file @ 49d3d9cf
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/copy.sgml,v 1.56 2004/04/19 17:22:30 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/copy.sgml,v 1.57 2004/04/21 00:34:18 momjian Exp $
PostgreSQL documentation
-->
......@@ -29,7 +29,7 @@ COPY <replaceable class="parameter">tablename</replaceable> [ ( <replaceable cla
[ NULL [ AS ] '<replaceable class="parameter">null string</replaceable>' ]
[ CSV [ QUOTE [ AS ] '<replaceable class="parameter">quote</replaceable>' ]
[ ESCAPE [ AS ] '<replaceable class="parameter">escape</replaceable>' ]
[ LITERAL <replaceable class="parameter">column</replaceable> [, ...] ]
[ FORCE NOT NULL <replaceable class="parameter">column</replaceable> [, ...] ]
COPY <replaceable class="parameter">tablename</replaceable> [ ( <replaceable class="parameter">column</replaceable> [, ...] ) ]
TO { '<replaceable class="parameter">filename</replaceable>' | STDOUT }
......@@ -40,7 +40,7 @@ COPY <replaceable class="parameter">tablename</replaceable> [ ( <replaceable cla
[ NULL [ AS ] '<replaceable class="parameter">null string</replaceable>' ]
[ CSV [ QUOTE [ AS ] '<replaceable class="parameter">quote</replaceable>' ]
[ ESCAPE [ AS ] '<replaceable class="parameter">escape</replaceable>' ]
[ FORCE <replaceable class="parameter">column</replaceable> [, ...] ]
[ FORCE QUOTE <replaceable class="parameter">column</replaceable> [, ...] ]
</synopsis>
</refsynopsisdiv>
......@@ -185,10 +185,10 @@ COPY <replaceable class="parameter">tablename</replaceable> [ ( <replaceable cla
<term><literal>CSV</literal></term>
<listitem>
<para>
Enables Comma Separated Variable (<literal>CSV</>) mode. (Also called
Comma Separated Value). It sets the default <literal>DELIMITER</> to
comma, and <literal>QUOTE</> and <literal>ESCAPE</> values to
double-quote.
Enables Comma Separated Variable (<literal>CSV</>) mode. (Also
called Comma Separated Value). It sets the default
<literal>DELIMITER</> to comma, and <literal>QUOTE</> and
<literal>ESCAPE</> values to double-quote.
</para>
</listitem>
</varlistentry>
......@@ -207,38 +207,33 @@ COPY <replaceable class="parameter">tablename</replaceable> [ ( <replaceable cla
<term><replaceable class="parameter">escape</replaceable></term>
<listitem>
<para>
Specifies the character that should appear before a <literal>QUOTE</>
data character value in <literal>CSV</> mode. The default is the
<literal>QUOTE</> value (usually double-quote).
Specifies the character that should appear before a
<literal>QUOTE</> data character value in <literal>CSV</> mode.
The default is the <literal>QUOTE</> value (usually double-quote).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>FORCE</></term>
<term><literal>FORCE QUOTE</></term>
<listitem>
<para>
In <literal>CSV</> <command>COPY TO</> mode, forces quoting
to be used for all non-<literal>NULL</> values in each specified
column. <literal>NULL</> output is never quoted.
In <literal>CSV</> <command>COPY TO</> mode, forces quoting to be
used for all non-<literal>NULL</> values in each specified column.
<literal>NULL</> output is never quoted.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>LITERAL</></term>
<term><literal>FORCE NOT NULL</></term>
<listitem>
<para>
In <literal>CSV</> <command>COPY FROM</> mode, for each column specified,
do not do a <literal>null string</> comparison; instead load the value
literally. <literal>QUOTE</> and <literal>ESCAPE</> processing are still
performed.
</para>
<para>
If the <literal>null string</> is <literal>''</> (the default
in <literal>CSV</> mode), a missing input value (<literal>delimiter,
delimiter</>), will load as a zero-length string. <literal>Delimiter, quote,
quote, delimiter</> is always treated as a zero-length string on input.
In <literal>CSV</> <command>COPY FROM</> mode, process each
specified column as though it were quoted and hance not a
<literal>NULL</> value. For the default <literal>null string</> in
<literal>CSV</> mode (<literal>''</>), this causes a missing
values to be input as a zero-length strings.
</para>
</listitem>
</varlistentry>
......@@ -483,7 +478,7 @@ COPY <replaceable class="parameter">tablename</replaceable> [ ( <replaceable cla
suffixed by the <literal>QUOTE</> character, and any occurrence
within the value of a <literal>QUOTE</> character or the
<literal>ESCAPE</> character is preceded by the escape character.
You can also use <literal>FORCE</> to force quotes when outputting
You can also use <literal>FORCE QUOTE</> to force quotes when outputting
non-<literal>NULL</> values in specific columns.
</para>
......@@ -496,7 +491,7 @@ COPY <replaceable class="parameter">tablename</replaceable> [ ( <replaceable cla
is quoted. Therefore, using the default settings, a <literal>NULL</> is
written as an unquoted empty string, while an empty string is
written with double quotes (<literal>""</>). Reading values follows
similar rules. You can use <literal>LITERAL</> to prevent <literal>NULL</>
similar rules. You can use <literal>FORCE NOT NULL</> to prevent <literal>NULL</>
input comparisons for specific columns.
</para>
......
doc/src/sgml/ref/psql-ref.sgml
View file @ 49d3d9cf
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.111 2004/04/19 17:22:30 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.112 2004/04/21 00:34:18 momjian Exp $
PostgreSQL documentation
-->
......@@ -713,8 +713,8 @@ testdb=>
[ <literal>null [as] </literal> '<replaceable class="parameter">string</replaceable>' ]</literal>
[ <literal>csv [ quote [as] </literal> '<replaceable class="parameter">character</replaceable>' ]
[ <literal>escape [as] </literal> '<replaceable class="parameter">character</replaceable>' ]
[ <literal>force</> <replaceable class="parameter">column_list</replaceable> ]
[ <literal>literal</> <replaceable class="parameter">column_list</replaceable> ] ]
[ <literal>force quote</> <replaceable class="parameter">column_list</replaceable> ]
[ <literal>force not null</> <replaceable class="parameter">column_list</replaceable> ] ]
</term>
<listitem>
......
src/backend/commands/copy.c
View file @ 49d3d9cf
......@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/copy.c,v 1.222 2004/04/19 21:58:02 momjian Exp $
* $PostgreSQL: pgsql/src/backend/commands/copy.c,v 1.223 2004/04/21 00:34:18 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -132,10 +132,10 @@ static bool line_buf_converted;
/* non-export function prototypes */
static void CopyTo(Relation rel, List *attnumlist, bool binary, bool oids,
char *delim, char *null_print, bool csv_mode, char *quote, char *escape,
List *force_atts);
List *force_quote_atts);
static void CopyFrom(Relation rel, List *attnumlist, bool binary, bool oids,
char *delim, char *null_print, bool csv_mode, char *quote, char *escape,
List *literal_atts);
List *force_notnull_atts);
static bool CopyReadLine(void);
static char *CopyReadAttribute(const char *delim, const char *null_print,
CopyReadResult *result, bool *isnull);
......@@ -695,10 +695,10 @@ DoCopy(const CopyStmt *stmt)
char *quote = NULL;
char *escape = NULL;
char *null_print = NULL;
List *force = NIL;
List *literal = NIL;
List *force_atts = NIL;
List *literal_atts = NIL;
List *force_quote = NIL;
List *force_notnull = NIL;
List *force_quote_atts = NIL;
List *force_notnull_atts = NIL;
Relation rel;
AclMode required_access = (is_from ? ACL_INSERT : ACL_SELECT);
AclResult aclresult;
......@@ -764,21 +764,21 @@ DoCopy(const CopyStmt *stmt)
errmsg("conflicting or redundant options")));
escape = strVal(defel->arg);
}
else if (strcmp(defel->defname, "force") == 0)
else if (strcmp(defel->defname, "force_quote") == 0)
{
if (force)
if (force_quote)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
force = (List *)defel->arg;
force_quote = (List *)defel->arg;
}
else if (strcmp(defel->defname, "literal") == 0)
else if (strcmp(defel->defname, "force_notnull") == 0)
{
if (literal)
if (force_notnull)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting or redundant options")));
literal = (List *)defel->arg;
force_notnull = (List *)defel->arg;
}
else
elog(ERROR, "option \"%s\" not recognized",
......@@ -850,28 +850,28 @@ DoCopy(const CopyStmt *stmt)
errmsg("COPY escape must be a single character")));
/*
* Check force
* Check force_quote
*/
if (!csv_mode && force != NIL)
if (!csv_mode && force_quote != NIL)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY force available only in CSV mode")));
if (force != NIL && is_from)
errmsg("COPY force quote available only in CSV mode")));
if (force_quote != NIL && is_from)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY force only available using COPY TO")));
errmsg("COPY force quote only available using COPY TO")));
/*
* Check literal
* Check force_notnull
*/
if (!csv_mode && literal != NIL)
if (!csv_mode && force_notnull != NIL)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY literal available only in CSV mode")));
if (literal != NIL && !is_from)
errmsg("COPY force not null available only in CSV mode")));
if (force_notnull != NIL && !is_from)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY literal only available using COPY FROM")));
errmsg("COPY force not null only available using COPY FROM")));
/*
* Don't allow the delimiter to appear in the null string.
......@@ -928,47 +928,47 @@ DoCopy(const CopyStmt *stmt)
attnumlist = CopyGetAttnums(rel, attnamelist);
/*
* Check that FORCE references valid COPY columns
* Check that FORCE QUOTE references valid COPY columns
*/
if (force)
if (force_quote)
{
TupleDesc tupDesc = RelationGetDescr(rel);
Form_pg_attribute *attr = tupDesc->attrs;
List *cur;
force_atts = CopyGetAttnums(rel, force);
force_quote_atts = CopyGetAttnums(rel, force_quote);
foreach(cur, force_atts)
foreach(cur, force_quote_atts)
{
int attnum = lfirsti(cur);
if (!intMember(attnum, attnumlist))
ereport(ERROR,
(errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
errmsg("FORCE column \"%s\" not referenced by COPY",
errmsg("FORCE QUOTE column \"%s\" not referenced by COPY",
NameStr(attr[attnum - 1]->attname))));
}
}
/*
* Check that LITERAL references valid COPY columns
* Check that FORCE NOT NULL references valid COPY columns
*/
if (literal)
if (force_notnull)
{
List *cur;
TupleDesc tupDesc = RelationGetDescr(rel);
Form_pg_attribute *attr = tupDesc->attrs;
literal_atts = CopyGetAttnums(rel, literal);
force_notnull_atts = CopyGetAttnums(rel, force_notnull);
foreach(cur, literal_atts)
foreach(cur, force_notnull_atts)
{
int attnum = lfirsti(cur);
if (!intMember(attnum, attnumlist))
ereport(ERROR,
(errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
errmsg("LITERAL column \"%s\" not referenced by COPY",
errmsg("FORCE NOT NULL column \"%s\" not referenced by COPY",
NameStr(attr[attnum - 1]->attname))));
}
}
......@@ -1037,7 +1037,7 @@ DoCopy(const CopyStmt *stmt)
}
}
CopyFrom(rel, attnumlist, binary, oids, delim, null_print, csv_mode,
quote, escape, literal_atts);
quote, escape, force_notnull_atts);
}
else
{ /* copy from database to file */
......@@ -1100,7 +1100,7 @@ DoCopy(const CopyStmt *stmt)
}
}
CopyTo(rel, attnumlist, binary, oids, delim, null_print, csv_mode,
quote, escape, force_atts);
quote, escape, force_quote_atts);
}
if (!pipe)
......@@ -1133,7 +1133,7 @@ DoCopy(const CopyStmt *stmt)
static void
CopyTo(Relation rel, List *attnumlist, bool binary, bool oids,
char *delim, char *null_print, bool csv_mode, char *quote,
char *escape, List *force_atts)
char *escape, List *force_quote_atts)
{
HeapTuple tuple;
TupleDesc tupDesc;
......@@ -1180,7 +1180,7 @@ CopyTo(Relation rel, List *attnumlist, bool binary, bool oids,
&isvarlena[attnum - 1]);
fmgr_info(out_func_oid, &out_functions[attnum - 1]);
if (intMember(attnum, force_atts))
if (intMember(attnum, force_quote_atts))
force_quote[attnum - 1] = true;
else
force_quote[attnum - 1] = false;
......@@ -1434,7 +1434,7 @@ limit_printout_length(StringInfo buf)
static void
CopyFrom(Relation rel, List *attnumlist, bool binary, bool oids,
char *delim, char *null_print, bool csv_mode, char *quote,
char *escape, List *literal_atts)
char *escape, List *force_notnull_atts)
{
HeapTuple tuple;
TupleDesc tupDesc;
......@@ -1447,7 +1447,7 @@ CopyFrom(Relation rel, List *attnumlist, bool binary, bool oids,
Oid *elements;
Oid oid_in_element;
ExprState **constraintexprs;
bool *literal_nullstr;
bool *force_notnull;
bool hasConstraints = false;
int attnum;
int i;
......@@ -1509,7 +1509,7 @@ CopyFrom(Relation rel, List *attnumlist, bool binary, bool oids,
defmap = (int *) palloc((num_phys_attrs + 1) * sizeof(int));
defexprs = (ExprState **) palloc((num_phys_attrs + 1) * sizeof(ExprState *));
constraintexprs = (ExprState **) palloc0((num_phys_attrs + 1) * sizeof(ExprState *));
literal_nullstr = (bool *) palloc((num_phys_attrs + 1) * sizeof(bool));
force_notnull = (bool *) palloc((num_phys_attrs + 1) * sizeof(bool));
for (attnum = 1; attnum <= num_phys_attrs; attnum++)
{
......@@ -1526,10 +1526,10 @@ CopyFrom(Relation rel, List *attnumlist, bool binary, bool oids,
&in_func_oid, &elements[attnum - 1]);
fmgr_info(in_func_oid, &in_functions[attnum - 1]);
if (intMember(attnum, literal_atts))
literal_nullstr[attnum - 1] = true;
if (intMember(attnum, force_notnull_atts))
force_notnull[attnum - 1] = true;
else
literal_nullstr[attnum - 1] = false;
force_notnull[attnum - 1] = false;
/* Get default info if needed */
if (!intMember(attnum, attnumlist))
......@@ -1748,7 +1748,7 @@ CopyFrom(Relation rel, List *attnumlist, bool binary, bool oids,
string = CopyReadAttribute(delim, null_print,
&result, &isnull);
if (csv_mode && isnull && literal_nullstr[m])
if (csv_mode && isnull && force_notnull[m])
{
string = null_print; /* set to NULL string */
isnull = false;
......@@ -1947,7 +1947,7 @@ CopyFrom(Relation rel, List *attnumlist, bool binary, bool oids,
pfree(defmap);
pfree(defexprs);
pfree(constraintexprs);
pfree(literal_nullstr);
pfree(force_notnull);
ExecDropTupleTable(tupleTable, true);
......@@ -2558,14 +2558,13 @@ CopyAttributeOut(char *server_string, char *delim)
*/
static void
CopyAttributeOutCSV(char *server_string, char *delim, char *quote,
char *escape, bool force_quote)
char *escape, bool use_quote)
{
char *string;
char c;
char delimc = delim[0];
char quotec = quote[0];
char escapec = escape[0];
bool need_quote = force_quote;
char *test_string;
bool same_encoding;
int mblen;
......@@ -2583,23 +2582,23 @@ CopyAttributeOutCSV(char *server_string, char *delim, char *quote,
*/
for(test_string = string;
!need_quote && (c = *test_string) != '\0';
!use_quote && (c = *test_string) != '\0';
test_string += mblen)
{
if (c == delimc || c == quotec || c == '\n' || c == '\r')
need_quote = true;
use_quote = true;
if (!same_encoding)
mblen = pg_encoding_mblen(client_encoding, test_string);
else
mblen = 1;
}
if (need_quote)
if (use_quote)
CopySendChar(quotec);
for (; (c = *string) != '\0'; string += mblen)
{
if (need_quote && (c == quotec || c == escapec))
if (use_quote && (c == quotec || c == escapec))
CopySendChar(escapec);
CopySendChar(c);
......@@ -2615,7 +2614,7 @@ CopyAttributeOutCSV(char *server_string, char *delim, char *quote,
mblen = 1;
}
if (need_quote)
if (use_quote)
CopySendChar(quotec);
}
......
src/backend/parser/gram.y
View file @ 49d3d9cf
......@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.451 2004/04/19 17:22:30 momjian Exp $
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.452 2004/04/21 00:34:18 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
......@@ -370,7 +370,7 @@ static void doNegateFloat(Value *v);
KEY
LANCOMPILER LANGUAGE LARGE_P LAST_P LEADING LEFT LEVEL LIKE LIMIT
LISTEN LITERAL LOAD LOCAL LOCALTIME LOCALTIMESTAMP LOCATION
LISTEN LOAD LOCAL LOCALTIME LOCALTIMESTAMP LOCATION
LOCK_P
MATCH MAXVALUE MINUTE_P MINVALUE MODE MONTH_P MOVE
......@@ -1374,13 +1374,13 @@ copy_opt_item:
{
$$ = makeDefElem("escape", (Node *)makeString($3));
}
| FORCE columnList
| FORCE QUOTE columnList
{
$$ = makeDefElem("force", (Node *)$2);
$$ = makeDefElem("force_quote", (Node *)$3);
}
| LITERAL columnList
| FORCE NOT NULL_P columnList
{
$$ = makeDefElem("literal", (Node *)$2);
$$ = makeDefElem("force_notnull", (Node *)$4);
}
;
......@@ -7496,7 +7496,6 @@ unreserved_keyword:
| LAST_P
| LEVEL
| LISTEN
| LITERAL
| LOAD
| LOCAL
| LOCATION
......
src/backend/parser/keywords.c
View file @ 49d3d9cf
......@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.148 2004/04/19 17:22:31 momjian Exp $
* $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.149 2004/04/21 00:34:18 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -187,7 +187,6 @@ static const ScanKeyword ScanKeywords[] = {
{"like", LIKE},
{"limit", LIMIT},
{"listen", LISTEN},
{"literal", LITERAL},
{"load", LOAD},
{"local", LOCAL},
{"localtime", LOCALTIME},
......
src/bin/psql/copy.c
View file @ 49d3d9cf
......@@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2003, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/copy.c,v 1.45 2004/04/19 17:42:58 momjian Exp $
* $PostgreSQL: pgsql/src/bin/psql/copy.c,v 1.46 2004/04/21 00:34:18 momjian Exp $
*/
#include "postgres_fe.h"
#include "copy.h"
......@@ -71,8 +71,8 @@ struct copy_options
char *null;
char *quote;
char *escape;
char *force_list;
char *literal_list;
char *force_quote_list;
char *force_notnull_list;
};
......@@ -88,8 +88,8 @@ free_copy_options(struct copy_options * ptr)
free(ptr->null);
free(ptr->quote);
free(ptr->escape);
free(ptr->force_list);
free(ptr->literal_list);
free(ptr->force_quote_list);
free(ptr->force_notnull_list);
free(ptr);
}
......@@ -344,45 +344,56 @@ parse_slash_copy(const char *args)
}
else if (strcasecmp(token, "force") == 0)
{
/* handle column list */
fetch_next = false;
for (;;)
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
if (strcasecmp(token, "quote") == 0)
{
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
if (!token || strchr(",", token[0]))
goto error;
if (!result->force_list)
result->force_list = pg_strdup(token);
else
xstrcat(&result->force_list, token);
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
if (!token || token[0] != ',')
break;
xstrcat(&result->force_list, token);
/* handle column list */
fetch_next = false;
for (;;)
{
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
if (!token || strchr(",", token[0]))
goto error;
if (!result->force_quote_list)
result->force_quote_list = pg_strdup(token);
else
xstrcat(&result->force_quote_list, token);
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
if (!token || token[0] != ',')
break;
xstrcat(&result->force_quote_list, token);
}
}
}
else if (strcasecmp(token, "literal") == 0)
{
/* handle column list */
fetch_next = false;
for (;;)
else if (strcasecmp(token, "not") == 0)
{
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
if (!token || strchr(",", token[0]))
if (strcasecmp(token, "null") != 0)
goto error;
if (!result->literal_list)
result->literal_list = pg_strdup(token);
else
xstrcat(&result->literal_list, token);
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
if (!token || token[0] != ',')
break;
xstrcat(&result->literal_list, token);
/* handle column list */
fetch_next = false;
for (;;)
{
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
if (!token || strchr(",", token[0]))
goto error;
if (!result->force_notnull_list)
result->force_notnull_list = pg_strdup(token);
else
xstrcat(&result->force_notnull_list, token);
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
if (!token || token[0] != ',')
break;
xstrcat(&result->force_notnull_list, token);
}
}
else
goto error;
}
else
goto error;
......@@ -493,14 +504,14 @@ do_copy(const char *args)
appendPQExpBuffer(&query, " ESCAPE AS '%s'", options->escape);
}
if (options->force_list)
if (options->force_quote_list)
{
appendPQExpBuffer(&query, " FORCE %s", options->force_list);
appendPQExpBuffer(&query, " FORCE QUOTE %s", options->force_quote_list);
}
if (options->literal_list)
if (options->force_notnull_list)
{
appendPQExpBuffer(&query, " LITERAL %s", options->literal_list);
appendPQExpBuffer(&query, " FORCE NOT NULL %s", options->force_notnull_list);
}
if (options->from)
......
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