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Change plpgsql's GET DIAGNOSTICS statement to use SQL99-compatible
syntax. Fix the RESULT_OID case, which never worked. Add documentation.
This commit is contained in:
Tom Lane
parent
66858ebc67
commit
414f94f262
@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/Attic/plsql.sgml,v 2.19 2001/02/10 05:32:33 tgl Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/Attic/plsql.sgml,v 2.20 2001/02/19 19:49:52 tgl Exp $
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-->
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<chapter id="plsql">
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@ -102,7 +102,7 @@ $Header: /cvsroot/pgsql/doc/src/sgml/Attic/plsql.sgml,v 2.19 2001/02/10 05:32:33
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<para>
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The PL/pgSQL language is case insensitive. All keywords and
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identifiers can be used in mixed upper- and lowercase.
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identifiers can be used in mixed upper- and lower-case.
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</para>
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<para>
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PL/pgSQL is a block oriented language. A block is defined as
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@ -181,7 +181,7 @@ END;
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must also have a default value specified.
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</para>
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<para>
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The default value is evaluated every time the function is called. So
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The default value is evaluated every time the block is entered. So
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assigning '<replaceable>now</replaceable>' to a variable of type
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<type>timestamp</type> causes the variable to have the
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time of the actual function call, not when the function was
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@ -203,7 +203,7 @@ END;
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corresponding identifier $n will be a rowtype, but it
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must be aliased using the ALIAS command described below. Only the user
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attributes of a table row are accessible in the row, no Oid or other
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system attributes (hence the row could be from a view and view rows
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system attributes (because the row could be from a view and view rows
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don't have useful system attributes).
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</para>
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<para>
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@ -311,7 +311,7 @@ RENAME <replaceable>oldname</replaceable> TO <replaceable>newname</replaceable>;
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Using the <replaceable>table.field</replaceable>%TYPE
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causes PL/pgSQL to look up the attributes definitions at the
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first call to the function during the lifetime of a backend.
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Have a table with a char(20) attribute and some PL/pgSQL functions
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Suppose we have a table with a char(20) attribute and some PL/pgSQL functions
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that deal with its content in local variables. Now someone
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decides that char(20) isn't enough, dumps the table, drops it,
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recreates it now with the attribute in question defined as
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@ -553,6 +553,26 @@ EXECUTE ''UPDATE tbl SET ''
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>Obtaining other results status</term>
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<listitem>
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<para>
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<programlisting>
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GET DIAGNOSTICS <replaceable>variable</replaceable> = <replaceable>item</replaceable> [ , ... ]
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</programlisting>
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This command allows retrieval of system status indicators. Each
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<replaceable>item</replaceable> is a keyword identifying a state
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value to be assigned to the specified variable (which should be of
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the right datatype to receive it). The currently available status
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items are <keyword>ROW_COUNT</>, the number of rows processed by
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the last SQL query sent down to the SQL engine; and
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<keyword>RESULT_OID</>, the Oid of the last row inserted by the
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most recent SQL query. Note that <keyword>RESULT_OID</> is only
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useful after an INSERT query.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>Returning from the function</term>
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<listitem>
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@ -3,22 +3,23 @@
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* spi.c
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* Server Programming Interface
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*
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* $Id: spi.c,v 1.51 2001/01/04 02:36:52 tgl Exp $
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* $Id: spi.c,v 1.52 2001/02/19 19:49:52 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "executor/spi_priv.h"
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#include "access/printtup.h"
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uint32 SPI_processed = 0;
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Oid SPI_lastoid = InvalidOid;
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SPITupleTable *SPI_tuptable = NULL;
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int SPI_result;
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static _SPI_connection *_SPI_stack = NULL;
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static _SPI_connection *_SPI_current = NULL;
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static int _SPI_connected = -1;
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static int _SPI_curid = -1;
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DLLIMPORT uint32 SPI_processed = 0;
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DLLIMPORT SPITupleTable *SPI_tuptable = NULL;
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DLLIMPORT int SPI_result;
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static int _SPI_execute(char *src, int tcount, _SPI_plan *plan);
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static int _SPI_pquery(QueryDesc *queryDesc, EState *state, int tcount);
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@ -155,6 +156,7 @@ AtEOXact_SPI(void)
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_SPI_current = _SPI_stack = NULL;
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_SPI_connected = _SPI_curid = -1;
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SPI_processed = 0;
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SPI_lastoid = InvalidOid;
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SPI_tuptable = NULL;
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}
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@ -623,6 +625,7 @@ _SPI_execute(char *src, int tcount, _SPI_plan *plan)
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CommandCounterIncrement();
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SPI_processed = 0;
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SPI_lastoid = InvalidOid;
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SPI_tuptable = NULL;
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_SPI_current->tuptable = NULL;
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_SPI_current->qtlist = NULL;
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@ -723,6 +726,7 @@ _SPI_execute_plan(_SPI_plan *plan, Datum *Values, char *Nulls, int tcount)
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CommandCounterIncrement();
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SPI_processed = 0;
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SPI_lastoid = InvalidOid;
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SPI_tuptable = NULL;
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_SPI_current->tuptable = NULL;
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_SPI_current->qtlist = NULL;
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@ -786,6 +790,7 @@ _SPI_pquery(QueryDesc *queryDesc, EState *state, int tcount)
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bool isRetrieveIntoRelation = false;
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char *intoName = NULL;
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int res;
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Oid save_lastoid;
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switch (operation)
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{
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@ -840,6 +845,8 @@ _SPI_pquery(QueryDesc *queryDesc, EState *state, int tcount)
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ExecutorRun(queryDesc, state, EXEC_FOR, (long) tcount);
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_SPI_current->processed = state->es_processed;
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save_lastoid = state->es_lastoid;
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if (operation == CMD_SELECT && queryDesc->dest == SPI)
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{
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if (_SPI_checktuples())
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@ -859,6 +866,7 @@ _SPI_pquery(QueryDesc *queryDesc, EState *state, int tcount)
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if (dest == SPI)
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{
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SPI_processed = _SPI_current->processed;
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SPI_lastoid = save_lastoid;
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SPI_tuptable = _SPI_current->tuptable;
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}
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queryDesc->dest = dest;
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@ -71,6 +71,7 @@ typedef struct
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#define SPI_OK_CURSOR 10
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extern DLLIMPORT uint32 SPI_processed;
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extern DLLIMPORT Oid SPI_lastoid;
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extern DLLIMPORT SPITupleTable *SPI_tuptable;
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extern DLLIMPORT int SPI_result;
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@ -4,7 +4,7 @@
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* procedural language
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/gram.y,v 1.15 2001/02/10 22:53:40 momjian Exp $
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* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/gram.y,v 1.16 2001/02/19 19:49:53 tgl Exp $
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*
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* This software is copyrighted by Jan Wieck - Hamburg.
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*
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@ -63,7 +63,13 @@ static PLpgSQL_expr *make_tupret_expr(PLpgSQL_row *row);
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{
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int nalloc;
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int nused;
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int *dtnums;
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int *nums;
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} intlist;
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struct
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{
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int nalloc;
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int nused;
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PLpgSQL_diag_item *dtitems;
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} dtlist;
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struct
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{
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@ -119,11 +125,11 @@ static PLpgSQL_expr *make_tupret_expr(PLpgSQL_row *row);
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%type <stmt> stmt_fors, stmt_select, stmt_perform
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%type <stmt> stmt_dynexecute, stmt_dynfors, stmt_getdiag
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%type <dtlist> raise_params
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%type <intlist> raise_params
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%type <ival> raise_level, raise_param
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%type <str> raise_msg
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%type <dtlist> getdiag_items, getdiag_targets
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%type <dtlist> getdiag_list
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%type <ival> getdiag_item, getdiag_target
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%type <ival> lno
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@ -156,11 +162,11 @@ static PLpgSQL_expr *make_tupret_expr(PLpgSQL_row *row);
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%token K_NOTICE
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%token K_NULL
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%token K_PERFORM
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%token K_PROCESSED
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%token K_ROW_COUNT
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%token K_RAISE
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%token K_RECORD
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%token K_RENAME
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%token K_RESULT
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%token K_RESULT_OID
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%token K_RETURN
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%token K_REVERSE
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%token K_SELECT
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@ -607,7 +613,7 @@ stmt_assign : assign_var lno K_ASSIGN expr_until_semi
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}
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;
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stmt_getdiag : K_GET K_DIAGNOSTICS lno K_SELECT getdiag_items K_INTO getdiag_targets ';'
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stmt_getdiag : K_GET K_DIAGNOSTICS lno getdiag_list ';'
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{
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PLpgSQL_stmt_getdiag *new;
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@ -616,79 +622,49 @@ stmt_getdiag : K_GET K_DIAGNOSTICS lno K_SELECT getdiag_items K_INTO getdiag_tar
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new->cmd_type = PLPGSQL_STMT_GETDIAG;
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new->lineno = $3;
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new->nitems = $5.nused;
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new->items = malloc(sizeof(int) * $5.nused);
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new->ntargets = $7.nused;
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new->targets = malloc(sizeof(int) * $7.nused);
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memcpy(new->items, $5.dtnums, sizeof(int) * $5.nused);
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memcpy(new->targets, $7.dtnums, sizeof(int) * $7.nused);
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if (new->nitems != new->ntargets)
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{
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plpgsql_error_lineno = new->lineno;
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plpgsql_comperrinfo();
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elog(ERROR, "number of diagnostic items does not match target list");
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};
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new->ndtitems = $4.nused;
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new->dtitems = malloc(sizeof(PLpgSQL_diag_item) * $4.nused);
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memcpy(new->dtitems, $4.dtitems, sizeof(PLpgSQL_diag_item) * $4.nused);
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$$ = (PLpgSQL_stmt *)new;
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}
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;
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getdiag_items : getdiag_items ',' getdiag_item
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getdiag_list : getdiag_list ',' getdiag_target K_ASSIGN getdiag_item
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{
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if ($1.nused == $1.nalloc)
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{
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$1.nalloc *= 2;
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$1.dtnums = repalloc($1.dtnums, sizeof(int) * $1.nalloc);
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$1.dtitems = repalloc($1.dtitems, sizeof(PLpgSQL_diag_item) * $1.nalloc);
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}
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$1.dtnums[$1.nused++] = $3;
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$1.dtitems[$1.nused].target = $3;
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$1.dtitems[$1.nused].item = $5;
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$1.nused++;
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$$.nalloc = $1.nalloc;
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$$.nused = $1.nused;
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$$.dtnums = $1.dtnums;
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$$.dtitems = $1.dtitems;
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}
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| getdiag_item
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| getdiag_target K_ASSIGN getdiag_item
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{
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$$.nalloc = 1;
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$$.nused = 1;
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$$.dtnums = palloc(sizeof(int) * $$.nalloc);
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$$.dtnums[0] = $1;
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$$.dtitems = palloc(sizeof(PLpgSQL_diag_item) * $$.nalloc);
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$$.dtitems[0].target = $1;
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$$.dtitems[0].item = $3;
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}
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;
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getdiag_item : K_PROCESSED
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getdiag_item : K_ROW_COUNT
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{
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$$ = PLPGSQL_GETDIAG_PROCESSED;
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$$ = PLPGSQL_GETDIAG_ROW_COUNT;
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}
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| K_RESULT
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| K_RESULT_OID
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{
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$$ = PLPGSQL_GETDIAG_RESULT;
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$$ = PLPGSQL_GETDIAG_RESULT_OID;
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}
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;
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getdiag_targets : getdiag_targets ',' getdiag_target
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{
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if ($1.nused == $1.nalloc)
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{
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$1.nalloc *= 2;
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$1.dtnums = repalloc($1.dtnums, sizeof(int) * $1.nalloc);
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}
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$1.dtnums[$1.nused++] = $3;
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$$.nalloc = $1.nalloc;
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$$.nused = $1.nused;
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$$.dtnums = $1.dtnums;
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}
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| getdiag_target
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{
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$$.nalloc = 1;
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$$.nused = 1;
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$$.dtnums = palloc(sizeof(int) * $$.nalloc);
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$$.dtnums[0] = $1;
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}
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;
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getdiag_target : T_VARIABLE
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{
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if (yylval.var->isconst)
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@ -1070,7 +1046,7 @@ stmt_raise : K_RAISE lno raise_level raise_msg raise_params ';'
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new->message = $4;
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new->nparams = $5.nused;
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new->params = malloc(sizeof(int) * $5.nused);
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memcpy(new->params, $5.dtnums, sizeof(int) * $5.nused);
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memcpy(new->params, $5.nums, sizeof(int) * $5.nused);
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$$ = (PLpgSQL_stmt *)new;
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}
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@ -1116,20 +1092,20 @@ raise_params : raise_params raise_param
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if ($1.nused == $1.nalloc)
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{
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$1.nalloc *= 2;
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$1.dtnums = repalloc($1.dtnums, sizeof(int) * $1.nalloc);
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$1.nums = repalloc($1.nums, sizeof(int) * $1.nalloc);
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}
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$1.dtnums[$1.nused++] = $2;
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$1.nums[$1.nused++] = $2;
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$$.nalloc = $1.nalloc;
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$$.nused = $1.nused;
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$$.dtnums = $1.dtnums;
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$$.nums = $1.nums;
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}
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| raise_param
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{
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$$.nalloc = 1;
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$$.nused = 1;
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$$.dtnums = palloc(sizeof(int) * $$.nalloc);
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$$.dtnums[0] = $1;
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$$.nums = palloc(sizeof(int) * $$.nalloc);
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$$.nums[0] = $1;
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}
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;
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@ -3,7 +3,7 @@
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* procedural language
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/pl_exec.c,v 1.37 2001/02/09 00:14:26 tgl Exp $
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* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/pl_exec.c,v 1.38 2001/02/19 19:49:53 tgl Exp $
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*
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* This software is copyrighted by Jan Wieck - Hamburg.
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*
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@ -1071,33 +1071,38 @@ exec_stmt_getdiag(PLpgSQL_execstate * estate, PLpgSQL_stmt_getdiag * stmt)
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PLpgSQL_datum *var;
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bool isnull = false;
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for ( i=0 ; i < stmt->nitems ; i++)
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for ( i=0 ; i < stmt->ndtitems ; i++)
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{
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if ((stmt->targets[i] <= 0))
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break;
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PLpgSQL_diag_item *dtitem = & stmt->dtitems[i];
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var = (estate->datums[stmt->targets[i]]);
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if (dtitem->target <= 0)
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continue;
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var = (estate->datums[dtitem->target]);
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if (var == NULL)
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break;
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continue;
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switch (stmt->items[i])
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switch (dtitem->item)
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{
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case PLPGSQL_GETDIAG_PROCESSED:
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case PLPGSQL_GETDIAG_ROW_COUNT:
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exec_assign_value(estate, var, (Datum)SPI_processed, INT4OID, &isnull);
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exec_assign_value(estate, var, UInt32GetDatum(SPI_processed),
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INT4OID, &isnull);
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break;
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case PLPGSQL_GETDIAG_RESULT:
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case PLPGSQL_GETDIAG_RESULT_OID:
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exec_assign_value(estate, var, (Datum)SPI_result, INT4OID, &isnull);
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exec_assign_value(estate, var, ObjectIdGetDatum(SPI_lastoid),
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OIDOID, &isnull);
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break;
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default:
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elog(ERROR, "unknown attribute request %d in get_diagnostic", stmt->items[i]);
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};
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};
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elog(ERROR, "unknown attribute request %d in get_diagnostic",
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dtitem->item);
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}
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}
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return PLPGSQL_RC_OK;
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}
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@ -3,7 +3,7 @@
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* procedural language
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/pl_funcs.c,v 1.9 2000/12/03 20:45:40 tgl Exp $
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* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/pl_funcs.c,v 1.10 2001/02/19 19:49:53 tgl Exp $
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*
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* This software is copyrighted by Jan Wieck - Hamburg.
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*
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@ -708,20 +708,24 @@ dump_getdiag(PLpgSQL_stmt_getdiag * stmt)
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int i;
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dump_ind();
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printf("GET DIAGNOSTICS SELECT ");
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for (i = 0; i < stmt->nitems; i++)
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printf("GET DIAGNOSTICS ");
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for (i = 0; i < stmt->ndtitems; i++)
|
||||
{
|
||||
PLpgSQL_diag_item *dtitem = & stmt->dtitems[i];
|
||||
|
||||
if (i != 0)
|
||||
printf(", ");
|
||||
|
||||
switch (stmt->items[i])
|
||||
printf("{var %d} = ", dtitem->target);
|
||||
|
||||
switch (dtitem->item)
|
||||
{
|
||||
case PLPGSQL_GETDIAG_PROCESSED:
|
||||
printf("PROCESSED");
|
||||
case PLPGSQL_GETDIAG_ROW_COUNT:
|
||||
printf("ROW_COUNT");
|
||||
break;
|
||||
|
||||
case PLPGSQL_GETDIAG_RESULT:
|
||||
printf("RESULT");
|
||||
case PLPGSQL_GETDIAG_RESULT_OID:
|
||||
printf("RESULT_OID");
|
||||
break;
|
||||
|
||||
default:
|
||||
@ -729,15 +733,6 @@ dump_getdiag(PLpgSQL_stmt_getdiag * stmt)
|
||||
break;
|
||||
}
|
||||
}
|
||||
printf(" INTO ");
|
||||
for (i = 0; i < stmt->ntargets; i++)
|
||||
{
|
||||
if (i != 0)
|
||||
printf(", ");
|
||||
|
||||
printf("{var %d}", stmt->targets[i]);
|
||||
}
|
||||
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
|
||||
@ -3,7 +3,7 @@
|
||||
* procedural language
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/plpgsql.h,v 1.11 2000/09/05 09:02:18 wieck Exp $
|
||||
* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/plpgsql.h,v 1.12 2001/02/19 19:49:53 tgl Exp $
|
||||
*
|
||||
* This software is copyrighted by Jan Wieck - Hamburg.
|
||||
*
|
||||
@ -115,8 +115,8 @@ enum
|
||||
*/
|
||||
enum
|
||||
{
|
||||
PLPGSQL_GETDIAG_PROCESSED,
|
||||
PLPGSQL_GETDIAG_RESULT
|
||||
PLPGSQL_GETDIAG_ROW_COUNT,
|
||||
PLPGSQL_GETDIAG_RESULT_OID
|
||||
};
|
||||
|
||||
|
||||
@ -277,14 +277,19 @@ typedef struct
|
||||
PLpgSQL_expr *expr;
|
||||
} PLpgSQL_stmt_assign;
|
||||
|
||||
|
||||
typedef struct
|
||||
{ /* Get Disgnostics statement */
|
||||
{ /* Get Diagnostics item */
|
||||
int item; /* id for diagnostic value desired */
|
||||
int target; /* where to assign it */
|
||||
} PLpgSQL_diag_item;
|
||||
|
||||
typedef struct
|
||||
{ /* Get Diagnostics statement */
|
||||
int cmd_type;
|
||||
int lineno;
|
||||
int nitems;
|
||||
int *items;
|
||||
int ntargets;
|
||||
int *targets;
|
||||
int ndtitems;
|
||||
PLpgSQL_diag_item *dtitems;
|
||||
} PLpgSQL_stmt_getdiag;
|
||||
|
||||
|
||||
|
||||
@ -4,7 +4,7 @@
|
||||
* procedural language
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/Attic/scan.l,v 1.8 2000/09/15 11:59:40 ishii Exp $
|
||||
* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/Attic/scan.l,v 1.9 2001/02/19 19:49:53 tgl Exp $
|
||||
*
|
||||
* This software is copyrighted by Jan Wieck - Hamburg.
|
||||
*
|
||||
@ -114,13 +114,13 @@ not { return K_NOT; }
|
||||
notice { return K_NOTICE; }
|
||||
null { return K_NULL; }
|
||||
perform { return K_PERFORM; }
|
||||
processed { return K_PROCESSED; }
|
||||
raise { return K_RAISE; }
|
||||
record { return K_RECORD; }
|
||||
rename { return K_RENAME; }
|
||||
result { return K_RESULT; }
|
||||
result_oid { return K_RESULT_OID; }
|
||||
return { return K_RETURN; }
|
||||
reverse { return K_REVERSE; }
|
||||
row_count { return K_ROW_COUNT; }
|
||||
select { return K_SELECT; }
|
||||
then { return K_THEN; }
|
||||
to { return K_TO; }
|
||||
|
||||
Loading…
Reference in New Issue
Block a user