As discussed on several occasions previously, the new anonymous
composite type capability makes it possible to create a system view
based on a table function in a way that is hopefully palatable to
everyone. The attached patch takes advantage of this, moving
show_all_settings() from contrib/tablefunc into the backend (renamed
all_settings(). It is defined as a builtin returning type RECORD. During
initdb a system view is created to expose the same information presently
available through SHOW ALL. For example:
test=# select * from pg_settings where name like '%debug%';
name | setting
-----------------------+---------
debug_assertions | on
debug_pretty_print | off
debug_print_parse | off
debug_print_plan | off
debug_print_query | off
debug_print_rewritten | off
wal_debug | 0
(7 rows)
Additionally during initdb two rules are created which make it possible
to change settings by updating the system view -- a "virtual table" as
Tom put it. Here's an example:
Joe Conway
This commit is contained in:
Bruce Momjian
parent
4c4854c458
commit
45e2544584
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@ -46,9 +46,6 @@ Installation:
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installs following functions into database template1:
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show_all_settings()
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- returns the same information as SHOW ALL, but as a query result
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normal_rand(int numvals, float8 mean, float8 stddev, int seed)
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- returns a set of normally distributed float8 values
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@ -58,48 +55,15 @@ Installation:
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but you can create additional crosstab functions per the instructions
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in the documentation below.
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crosstab(text sql, N int)
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- returns a set of row_name plus N category value columns
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- requires anonymous composite type syntax in the FROM clause. See
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the instructions in the documentation below.
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Documentation
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==================================================================
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Name
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show_all_settings() - returns the same information as SHOW ALL,
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but as a query result.
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Synopsis
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show_all_settings()
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Inputs
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none
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Outputs
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Returns setof tablefunc_config_settings which is defined by:
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CREATE VIEW tablefunc_config_settings AS
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SELECT
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''::TEXT AS name,
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''::TEXT AS setting;
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Example usage
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test=# select * from show_all_settings();
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name | setting
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-------------------------------+---------------------------------------
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australian_timezones | off
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authentication_timeout | 60
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checkpoint_segments | 3
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.
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.
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.
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wal_debug | 0
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wal_files | 0
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wal_sync_method | fdatasync
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(94 rows)
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==================================================================
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Name
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normal_rand(int, float8, float8, int) - returns a set of normally
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distributed float8 values
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@ -267,6 +231,99 @@ select * from crosstab3(
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test2 | val6 | val7 |
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(2 rows)
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==================================================================
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Name
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crosstab(text, int) - returns a set of row_name
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plus N category value columns
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Synopsis
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crosstab(text sql, int N)
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Inputs
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sql
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A SQL statement which produces the source set of data. The SQL statement
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must return one row_name column, one category column, and one value
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column.
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e.g. provided sql must produce a set something like:
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row_name cat value
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----------+-------+-------
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row1 cat1 val1
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row1 cat2 val2
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row1 cat3 val3
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row1 cat4 val4
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row2 cat1 val5
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row2 cat2 val6
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row2 cat3 val7
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row2 cat4 val8
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N
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number of category value columns
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Outputs
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Returns setof record, which must defined with a column definition
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in the FROM clause of the SELECT statement, e.g.:
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SELECT *
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FROM crosstab(sql, 2) AS ct(row_name text, category_1 text, category_2 text);
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the example crosstab function produces a set something like:
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<== values columns ==>
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row_name category_1 category_2
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---------+------------+------------
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row1 val1 val2
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row2 val5 val6
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Notes
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1. The sql result must be ordered by 1,2.
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2. The number of values columns is determined at run-time. The
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column definition provided in the FROM clause must provide for
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N + 1 columns of the proper data types.
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3. Missing values (i.e. not enough adjacent rows of same row_name to
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fill the number of result values columns) are filled in with nulls.
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4. Extra values (i.e. too many adjacent rows of same row_name to fill
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the number of result values columns) are skipped.
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5. Rows with all nulls in the values columns are skipped.
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Example usage
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create table ct(id serial, rowclass text, rowid text, attribute text, value text);
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insert into ct(rowclass, rowid, attribute, value) values('group1','test1','att1','val1');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test1','att2','val2');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test1','att3','val3');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test1','att4','val4');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test2','att1','val5');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test2','att2','val6');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test2','att3','val7');
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insert into ct(rowclass, rowid, attribute, value) values('group1','test2','att4','val8');
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SELECT *
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FROM crosstab(
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'select rowid, attribute, value
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from ct
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where rowclass = ''group1''
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and (attribute = ''att2'' or attribute = ''att3'') order by 1,2;', 3)
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AS ct(row_name text, category_1 text, category_2 text, category_3 text);
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row_name | category_1 | category_2 | category_3
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----------+------------+------------+------------
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test1 | val2 | val3 |
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test2 | val6 | val7 |
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(2 rows)
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==================================================================
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-- Joe Conway
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@ -44,4 +44,6 @@ select * from crosstab2('select rowid, attribute, value from ct where rowclass =
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select * from crosstab3('select rowid, attribute, value from ct where rowclass = ''group2'' order by 1,2;');
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select * from crosstab4('select rowid, attribute, value from ct where rowclass = ''group2'' order by 1,2;');
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select * from crosstab('select rowid, attribute, value from ct where rowclass = ''group1'' order by 1,2;', 2) as c(rowid text, att1 text, att2 text);
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select * from crosstab('select rowid, attribute, value from ct where rowclass = ''group1'' order by 1,2;', 3) as c(rowid text, att1 text, att2 text, att3 text);
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select * from crosstab('select rowid, attribute, value from ct where rowclass = ''group1'' order by 1,2;', 4) as c(rowid text, att1 text, att2 text, att3 text, att4 text);
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@ -35,11 +35,13 @@
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#include "executor/spi.h"
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#include "utils/builtins.h"
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#include "utils/guc.h"
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#include "utils/lsyscache.h"
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#include "tablefunc.h"
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static bool compatTupleDescs(TupleDesc tupdesc1, TupleDesc tupdesc2);
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static void get_normal_pair(float8 *x1, float8 *x2);
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static TupleDesc make_crosstab_tupledesc(TupleDesc spi_tupdesc, int num_catagories);
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typedef struct
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{
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@ -66,118 +68,6 @@ typedef struct
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} \
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} while (0)
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/*
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* show_all_settings - equiv to SHOW ALL command but implemented as
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* a Table Function.
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*/
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PG_FUNCTION_INFO_V1(show_all_settings);
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Datum
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show_all_settings(PG_FUNCTION_ARGS)
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{
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FuncCallContext *funcctx;
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TupleDesc tupdesc;
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int call_cntr;
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int max_calls;
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TupleTableSlot *slot;
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AttInMetadata *attinmeta;
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/* stuff done only on the first call of the function */
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if(SRF_IS_FIRSTCALL())
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{
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Oid foid = fcinfo->flinfo->fn_oid;
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Oid functypeid;
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/* create a function context for cross-call persistence */
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funcctx = SRF_FIRSTCALL_INIT();
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/* get the typeid that represents our return type */
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functypeid = foidGetTypeId(foid);
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/* Build a tuple description for a funcrelid tuple */
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tupdesc = TypeGetTupleDesc(functypeid, NIL);
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/* allocate a slot for a tuple with this tupdesc */
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slot = TupleDescGetSlot(tupdesc);
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/* assign slot to function context */
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funcctx->slot = slot;
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/*
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* Generate attribute metadata needed later to produce tuples from raw
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* C strings
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*/
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attinmeta = TupleDescGetAttInMetadata(tupdesc);
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funcctx->attinmeta = attinmeta;
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/* total number of tuples to be returned */
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funcctx->max_calls = GetNumConfigOptions();
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}
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/* stuff done on every call of the function */
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funcctx = SRF_PERCALL_SETUP();
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call_cntr = funcctx->call_cntr;
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max_calls = funcctx->max_calls;
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slot = funcctx->slot;
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attinmeta = funcctx->attinmeta;
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if (call_cntr < max_calls) /* do when there is more left to send */
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{
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char **values;
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char *varname;
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char *varval;
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bool noshow;
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HeapTuple tuple;
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Datum result;
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/*
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* Get the next visible GUC variable name and value
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*/
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do
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{
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varval = GetConfigOptionByNum(call_cntr, (const char **) &varname, &noshow);
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if (noshow)
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{
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/* varval is a palloc'd copy, so free it */
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xpfree(varval);
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/* bump the counter and get the next config setting */
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call_cntr = ++funcctx->call_cntr;
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/* make sure we haven't gone too far now */
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if (call_cntr >= max_calls)
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SRF_RETURN_DONE(funcctx);
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}
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} while (noshow);
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/*
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* Prepare a values array for storage in our slot.
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* This should be an array of C strings which will
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* be processed later by the appropriate "in" functions.
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*/
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values = (char **) palloc(2 * sizeof(char *));
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values[0] = pstrdup(varname);
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values[1] = varval; /* varval is already a palloc'd copy */
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/* build a tuple */
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tuple = BuildTupleFromCStrings(attinmeta, values);
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/* make the tuple into a datum */
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result = TupleGetDatum(slot, tuple);
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/* Clean up */
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xpfree(values[0]);
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xpfree(values[1]);
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xpfree(values);
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SRF_RETURN_NEXT(funcctx, result);
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}
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else /* do when there is no more left */
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{
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SRF_RETURN_DONE(funcctx);
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}
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}
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/*
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* normal_rand - return requested number of random values
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* with a Gaussian (Normal) distribution.
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@ -368,7 +258,7 @@ crosstab(PG_FUNCTION_ARGS)
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int max_calls;
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TupleTableSlot *slot;
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AttInMetadata *attinmeta;
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SPITupleTable *spi_tuptable;
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SPITupleTable *spi_tuptable = NULL;
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TupleDesc spi_tupdesc;
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char *lastrowid;
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crosstab_fctx *fctx;
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@ -378,34 +268,20 @@ crosstab(PG_FUNCTION_ARGS)
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/* stuff done only on the first call of the function */
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if(SRF_IS_FIRSTCALL())
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{
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char *sql = GET_STR(PG_GETARG_TEXT_P(0));
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Oid foid = fcinfo->flinfo->fn_oid;
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Oid functypeid;
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TupleDesc tupdesc;
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int ret;
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int proc;
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char *sql = GET_STR(PG_GETARG_TEXT_P(0));
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Oid funcid = fcinfo->flinfo->fn_oid;
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Oid functypeid;
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char functyptype;
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TupleDesc tupdesc = NULL;
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int ret;
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int proc;
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MemoryContext oldcontext;
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/* create a function context for cross-call persistence */
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funcctx = SRF_FIRSTCALL_INIT();
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/* get the typeid that represents our return type */
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functypeid = foidGetTypeId(foid);
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/* Build a tuple description for a funcrelid tuple */
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tupdesc = TypeGetTupleDesc(functypeid, NIL);
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/* allocate a slot for a tuple with this tupdesc */
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slot = TupleDescGetSlot(tupdesc);
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/* assign slot to function context */
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funcctx->slot = slot;
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/*
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* Generate attribute metadata needed later to produce tuples from raw
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* C strings
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*/
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attinmeta = TupleDescGetAttInMetadata(tupdesc);
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funcctx->attinmeta = attinmeta;
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/* SPI switches context on us, so save it first */
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oldcontext = CurrentMemoryContext;
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/* Connect to SPI manager */
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if ((ret = SPI_connect()) < 0)
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@ -424,7 +300,7 @@ crosstab(PG_FUNCTION_ARGS)
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/*
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* The provided SQL query must always return three columns.
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*
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* 1. rowid the label or identifier for each row in the final
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* 1. rowname the label or identifier for each row in the final
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* result
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* 2. category the label or identifier for each column in the
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* final result
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@ -433,35 +309,78 @@ crosstab(PG_FUNCTION_ARGS)
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if (spi_tupdesc->natts != 3)
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elog(ERROR, "crosstab: provided SQL must return 3 columns;"
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" a rowid, a category, and a values column");
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/*
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* Check that return tupdesc is compatible with the one we got
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* from ret_relname, at least based on number and type of
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* attributes
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*/
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if (!compatTupleDescs(tupdesc, spi_tupdesc))
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elog(ERROR, "crosstab: return and sql tuple descriptions are"
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" incompatible");
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/* allocate memory for user context */
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fctx = (crosstab_fctx *) palloc(sizeof(crosstab_fctx));
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/*
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* OK, we have data, and it seems to be valid, so save it
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* for use across calls
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*/
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fctx->spi_tuptable = spi_tuptable;
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fctx->lastrowid = NULL;
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funcctx->user_fctx = fctx;
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/* total number of tuples to be returned */
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funcctx->max_calls = proc;
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}
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else
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{
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/* no qualifying tuples */
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funcctx->max_calls = 0;
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SPI_finish();
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SRF_RETURN_DONE(funcctx);
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}
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/* back to the original memory context */
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MemoryContextSwitchTo(oldcontext);
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/* get the typeid that represents our return type */
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functypeid = get_func_rettype(funcid);
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/* check typtype to see if we have a predetermined return type */
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functyptype = get_typtype(functypeid);
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if (functyptype == 'c')
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{
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/* Build a tuple description for a functypeid tuple */
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tupdesc = TypeGetTupleDesc(functypeid, NIL);
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}
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else if (functyptype == 'p' && functypeid == RECORDOID)
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{
|
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if (fcinfo->nargs != 2)
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elog(ERROR, "Wrong number of arguments specified for function");
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else
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{
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int num_catagories = PG_GETARG_INT32(1);
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tupdesc = make_crosstab_tupledesc(spi_tupdesc, num_catagories);
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}
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}
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else if (functyptype == 'b')
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elog(ERROR, "Invalid kind of return type specified for function");
|
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else
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elog(ERROR, "Unknown kind of return type specified for function");
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/*
|
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* Check that return tupdesc is compatible with the one we got
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* from ret_relname, at least based on number and type of
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* attributes
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*/
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if (!compatTupleDescs(tupdesc, spi_tupdesc))
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elog(ERROR, "crosstab: return and sql tuple descriptions are"
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" incompatible");
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/* allocate a slot for a tuple with this tupdesc */
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slot = TupleDescGetSlot(tupdesc);
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|
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/* assign slot to function context */
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funcctx->slot = slot;
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|
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/*
|
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* Generate attribute metadata needed later to produce tuples from raw
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* C strings
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*/
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attinmeta = TupleDescGetAttInMetadata(tupdesc);
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funcctx->attinmeta = attinmeta;
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/* allocate memory for user context */
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fctx = (crosstab_fctx *) palloc(sizeof(crosstab_fctx));
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/*
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* Save spi data for use across calls
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*/
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fctx->spi_tuptable = spi_tuptable;
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fctx->lastrowid = NULL;
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funcctx->user_fctx = fctx;
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|
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/* total number of tuples to be returned */
|
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funcctx->max_calls = proc;
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}
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|
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/* stuff done on every call of the function */
|
||||
|
|
@ -662,3 +581,51 @@ compatTupleDescs(TupleDesc ret_tupdesc, TupleDesc sql_tupdesc)
|
|||
/* OK, the two tupdescs are compatible for our purposes */
|
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return true;
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}
|
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|
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static TupleDesc
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make_crosstab_tupledesc(TupleDesc spi_tupdesc, int num_catagories)
|
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{
|
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Form_pg_attribute sql_attr;
|
||||
Oid sql_atttypid;
|
||||
TupleDesc tupdesc;
|
||||
int natts;
|
||||
AttrNumber attnum;
|
||||
char attname[NAMEDATALEN];
|
||||
int i;
|
||||
|
||||
/*
|
||||
* We need to build a tuple description with one column
|
||||
* for the rowname, and num_catagories columns for the values.
|
||||
* Each must be of the same type as the corresponding
|
||||
* spi result input column.
|
||||
*/
|
||||
natts = num_catagories + 1;
|
||||
tupdesc = CreateTemplateTupleDesc(natts, WITHOUTOID);
|
||||
|
||||
/* first the rowname column */
|
||||
attnum = 1;
|
||||
|
||||
sql_attr = spi_tupdesc->attrs[0];
|
||||
sql_atttypid = sql_attr->atttypid;
|
||||
|
||||
strcpy(attname, "rowname");
|
||||
|
||||
TupleDescInitEntry(tupdesc, attnum, attname, sql_atttypid,
|
||||
-1, 0, false);
|
||||
|
||||
/* now the catagory values columns */
|
||||
sql_attr = spi_tupdesc->attrs[2];
|
||||
sql_atttypid = sql_attr->atttypid;
|
||||
|
||||
for (i = 0; i < num_catagories; i++)
|
||||
{
|
||||
attnum++;
|
||||
|
||||
sprintf(attname, "category_%d", i + 1);
|
||||
TupleDescInitEntry(tupdesc, attnum, attname, sql_atttypid,
|
||||
-1, 0, false);
|
||||
}
|
||||
|
||||
return tupdesc;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -32,7 +32,6 @@
|
|||
/*
|
||||
* External declarations
|
||||
*/
|
||||
extern Datum show_all_settings(PG_FUNCTION_ARGS);
|
||||
extern Datum normal_rand(PG_FUNCTION_ARGS);
|
||||
extern Datum crosstab(PG_FUNCTION_ARGS);
|
||||
|
||||
|
|
|
|||
|
|
@ -1,12 +1,3 @@
|
|||
CREATE VIEW tablefunc_config_settings AS
|
||||
SELECT
|
||||
''::TEXT AS name,
|
||||
''::TEXT AS setting;
|
||||
|
||||
CREATE OR REPLACE FUNCTION show_all_settings()
|
||||
RETURNS setof tablefunc_config_settings
|
||||
AS 'MODULE_PATHNAME','show_all_settings' LANGUAGE 'c' STABLE STRICT;
|
||||
|
||||
CREATE OR REPLACE FUNCTION normal_rand(int4, float8, float8, int4)
|
||||
RETURNS setof float8
|
||||
AS 'MODULE_PATHNAME','normal_rand' LANGUAGE 'c' VOLATILE STRICT;
|
||||
|
|
@ -44,3 +35,6 @@ CREATE OR REPLACE FUNCTION crosstab4(text)
|
|||
RETURNS setof tablefunc_crosstab_4
|
||||
AS 'MODULE_PATHNAME','crosstab' LANGUAGE 'c' STABLE STRICT;
|
||||
|
||||
CREATE OR REPLACE FUNCTION crosstab(text,int)
|
||||
RETURNS setof record
|
||||
AS 'MODULE_PATHNAME','crosstab' LANGUAGE 'c' STABLE STRICT;
|
||||
|
|
@ -5,7 +5,7 @@
|
|||
* command, configuration file, and command line options.
|
||||
* See src/backend/utils/misc/README for more information.
|
||||
*
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v 1.81 2002/08/14 23:02:59 tgl Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v 1.82 2002/08/15 02:51:26 momjian Exp $
|
||||
*
|
||||
* Copyright 2000 by PostgreSQL Global Development Group
|
||||
* Written by Peter Eisentraut <peter_e@gmx.net>.
|
||||
|
|
@ -29,6 +29,7 @@
|
|||
#include "commands/vacuum.h"
|
||||
#include "executor/executor.h"
|
||||
#include "fmgr.h"
|
||||
#include "funcapi.h"
|
||||
#include "libpq/auth.h"
|
||||
#include "libpq/pqcomm.h"
|
||||
#include "mb/pg_wchar.h"
|
||||
|
|
@ -2403,6 +2404,117 @@ show_config_by_name(PG_FUNCTION_ARGS)
|
|||
PG_RETURN_TEXT_P(result_text);
|
||||
}
|
||||
|
||||
/*
|
||||
* show_all_settings - equiv to SHOW ALL command but implemented as
|
||||
* a Table Function.
|
||||
*/
|
||||
Datum
|
||||
show_all_settings(PG_FUNCTION_ARGS)
|
||||
{
|
||||
FuncCallContext *funcctx;
|
||||
TupleDesc tupdesc;
|
||||
int call_cntr;
|
||||
int max_calls;
|
||||
TupleTableSlot *slot;
|
||||
AttInMetadata *attinmeta;
|
||||
|
||||
/* stuff done only on the first call of the function */
|
||||
if(SRF_IS_FIRSTCALL())
|
||||
{
|
||||
/* create a function context for cross-call persistence */
|
||||
funcctx = SRF_FIRSTCALL_INIT();
|
||||
|
||||
/* need a tuple descriptor representing two TEXT columns */
|
||||
tupdesc = CreateTemplateTupleDesc(2, WITHOUTOID);
|
||||
TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
|
||||
TEXTOID, -1, 0, false);
|
||||
TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
|
||||
TEXTOID, -1, 0, false);
|
||||
|
||||
/* allocate a slot for a tuple with this tupdesc */
|
||||
slot = TupleDescGetSlot(tupdesc);
|
||||
|
||||
/* assign slot to function context */
|
||||
funcctx->slot = slot;
|
||||
|
||||
/*
|
||||
* Generate attribute metadata needed later to produce tuples from raw
|
||||
* C strings
|
||||
*/
|
||||
attinmeta = TupleDescGetAttInMetadata(tupdesc);
|
||||
funcctx->attinmeta = attinmeta;
|
||||
|
||||
/* total number of tuples to be returned */
|
||||
funcctx->max_calls = GetNumConfigOptions();
|
||||
}
|
||||
|
||||
/* stuff done on every call of the function */
|
||||
funcctx = SRF_PERCALL_SETUP();
|
||||
|
||||
call_cntr = funcctx->call_cntr;
|
||||
max_calls = funcctx->max_calls;
|
||||
slot = funcctx->slot;
|
||||
attinmeta = funcctx->attinmeta;
|
||||
|
||||
if (call_cntr < max_calls) /* do when there is more left to send */
|
||||
{
|
||||
char **values;
|
||||
char *varname;
|
||||
char *varval;
|
||||
bool noshow;
|
||||
HeapTuple tuple;
|
||||
Datum result;
|
||||
|
||||
/*
|
||||
* Get the next visible GUC variable name and value
|
||||
*/
|
||||
do
|
||||
{
|
||||
varval = GetConfigOptionByNum(call_cntr, (const char **) &varname, &noshow);
|
||||
if (noshow)
|
||||
{
|
||||
/* varval is a palloc'd copy, so free it */
|
||||
if (varval != NULL)
|
||||
pfree(varval);
|
||||
|
||||
/* bump the counter and get the next config setting */
|
||||
call_cntr = ++funcctx->call_cntr;
|
||||
|
||||
/* make sure we haven't gone too far now */
|
||||
if (call_cntr >= max_calls)
|
||||
SRF_RETURN_DONE(funcctx);
|
||||
}
|
||||
} while (noshow);
|
||||
|
||||
/*
|
||||
* Prepare a values array for storage in our slot.
|
||||
* This should be an array of C strings which will
|
||||
* be processed later by the appropriate "in" functions.
|
||||
*/
|
||||
values = (char **) palloc(2 * sizeof(char *));
|
||||
values[0] = pstrdup(varname);
|
||||
values[1] = varval; /* varval is already a palloc'd copy */
|
||||
|
||||
/* build a tuple */
|
||||
tuple = BuildTupleFromCStrings(attinmeta, values);
|
||||
|
||||
/* make the tuple into a datum */
|
||||
result = TupleGetDatum(slot, tuple);
|
||||
|
||||
/* Clean up */
|
||||
pfree(values[0]);
|
||||
if (varval != NULL)
|
||||
pfree(values[1]);
|
||||
pfree(values);
|
||||
|
||||
SRF_RETURN_NEXT(funcctx, result);
|
||||
}
|
||||
else /* do when there is no more left */
|
||||
{
|
||||
SRF_RETURN_DONE(funcctx);
|
||||
}
|
||||
}
|
||||
|
||||
static char *
|
||||
_ShowOption(struct config_generic *record)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -27,7 +27,7 @@
|
|||
# Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
||||
# Portions Copyright (c) 1994, Regents of the University of California
|
||||
#
|
||||
# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.165 2002/08/08 19:39:05 tgl Exp $
|
||||
# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.166 2002/08/15 02:51:26 momjian Exp $
|
||||
#
|
||||
#-------------------------------------------------------------------------
|
||||
|
||||
|
|
@ -1015,6 +1015,21 @@ CREATE VIEW pg_stat_database AS \
|
|||
pg_stat_get_db_blocks_hit(D.oid) AS blks_hit \
|
||||
FROM pg_database D;
|
||||
|
||||
CREATE VIEW pg_settings AS \
|
||||
SELECT \
|
||||
A.name, \
|
||||
A.setting \
|
||||
FROM pg_show_all_settings() AS A(name text, setting text);
|
||||
|
||||
CREATE RULE pg_settings_u AS \
|
||||
ON UPDATE TO pg_settings \
|
||||
WHERE new.name = old.name DO \
|
||||
SELECT set_config(old.name, new.setting, 'f');
|
||||
|
||||
CREATE RULE pg_settings_n AS \
|
||||
ON UPDATE TO pg_settings \
|
||||
DO INSTEAD NOTHING;
|
||||
|
||||
EOF
|
||||
if [ "$?" -ne 0 ]; then
|
||||
exit_nicely
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: pg_proc.h,v 1.253 2002/08/09 16:45:15 tgl Exp $
|
||||
* $Id: pg_proc.h,v 1.254 2002/08/15 02:51:27 momjian Exp $
|
||||
*
|
||||
* NOTES
|
||||
* The script catalog/genbki.sh reads this file and generates .bki
|
||||
|
|
@ -2885,6 +2885,8 @@ DATA(insert OID = 2077 ( current_setting PGNSP PGUID 12 f f t f s 1 25 "25" sho
|
|||
DESCR("SHOW X as a function");
|
||||
DATA(insert OID = 2078 ( set_config PGNSP PGUID 12 f f f f v 3 25 "25 25 16" set_config_by_name - _null_ ));
|
||||
DESCR("SET X as a function");
|
||||
DATA(insert OID = 2084 ( pg_show_all_settings PGNSP PGUID 12 f f t t s 0 2249 "" show_all_settings - _null_ ));
|
||||
DESCR("SHOW ALL as a function");
|
||||
|
||||
DATA(insert OID = 2079 ( pg_table_is_visible PGNSP PGUID 12 f f t f s 1 16 "26" pg_table_is_visible - _null_ ));
|
||||
DESCR("is table visible in search path?");
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: builtins.h,v 1.190 2002/08/09 16:45:16 tgl Exp $
|
||||
* $Id: builtins.h,v 1.191 2002/08/15 02:51:27 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -662,6 +662,7 @@ extern Datum quote_literal(PG_FUNCTION_ARGS);
|
|||
/* guc.c */
|
||||
extern Datum show_config_by_name(PG_FUNCTION_ARGS);
|
||||
extern Datum set_config_by_name(PG_FUNCTION_ARGS);
|
||||
extern Datum show_all_settings(PG_FUNCTION_ARGS);
|
||||
|
||||
/* catalog/pg_conversion.c */
|
||||
extern Datum pg_convert3(PG_FUNCTION_ARGS);
|
||||
|
|
|
|||
|
|
@ -1269,6 +1269,7 @@ SELECT viewname, definition FROM pg_views ORDER BY viewname;
|
|||
iexit | SELECT ih.name, ih.thepath, interpt_pp(ih.thepath, r.thepath) AS exit FROM ihighway ih, ramp r WHERE (ih.thepath ## r.thepath);
|
||||
pg_indexes | SELECT n.nspname AS schemaname, c.relname AS tablename, i.relname AS indexname, pg_get_indexdef(i.oid) AS indexdef FROM (((pg_index x JOIN pg_class c ON ((c.oid = x.indrelid))) JOIN pg_class i ON ((i.oid = x.indexrelid))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE ((c.relkind = 'r'::"char") AND (i.relkind = 'i'::"char"));
|
||||
pg_rules | SELECT n.nspname AS schemaname, c.relname AS tablename, r.rulename, pg_get_ruledef(r.oid) AS definition FROM ((pg_rewrite r JOIN pg_class c ON ((c.oid = r.ev_class))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (r.rulename <> '_RETURN'::name);
|
||||
pg_settings | SELECT a.name, a.setting FROM pg_show_all_settings() a;
|
||||
pg_stat_activity | SELECT d.oid AS datid, d.datname, pg_stat_get_backend_pid(s.backendid) AS procpid, pg_stat_get_backend_userid(s.backendid) AS usesysid, u.usename, pg_stat_get_backend_activity(s.backendid) AS current_query FROM pg_database d, (SELECT pg_stat_get_backend_idset() AS backendid) s, pg_shadow u WHERE ((pg_stat_get_backend_dbid(s.backendid) = d.oid) AND (pg_stat_get_backend_userid(s.backendid) = u.usesysid));
|
||||
pg_stat_all_indexes | SELECT c.oid AS relid, i.oid AS indexrelid, n.nspname AS schemaname, c.relname, i.relname AS indexrelname, pg_stat_get_numscans(i.oid) AS idx_scan, pg_stat_get_tuples_returned(i.oid) AS idx_tup_read, pg_stat_get_tuples_fetched(i.oid) AS idx_tup_fetch FROM (((pg_class c JOIN pg_index x ON ((c.oid = x.indrelid))) JOIN pg_class i ON ((i.oid = x.indexrelid))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (c.relkind = 'r'::"char");
|
||||
pg_stat_all_tables | SELECT c.oid AS relid, n.nspname AS schemaname, c.relname, pg_stat_get_numscans(c.oid) AS seq_scan, pg_stat_get_tuples_returned(c.oid) AS seq_tup_read, sum(pg_stat_get_numscans(i.indexrelid)) AS idx_scan, sum(pg_stat_get_tuples_fetched(i.indexrelid)) AS idx_tup_fetch, pg_stat_get_tuples_inserted(c.oid) AS n_tup_ins, pg_stat_get_tuples_updated(c.oid) AS n_tup_upd, pg_stat_get_tuples_deleted(c.oid) AS n_tup_del FROM ((pg_class c LEFT JOIN pg_index i ON ((c.oid = i.indrelid))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (c.relkind = 'r'::"char") GROUP BY c.oid, n.nspname, c.relname;
|
||||
|
|
@ -1304,12 +1305,14 @@ SELECT viewname, definition FROM pg_views ORDER BY viewname;
|
|||
shoelace_obsolete | SELECT shoelace.sl_name, shoelace.sl_avail, shoelace.sl_color, shoelace.sl_len, shoelace.sl_unit, shoelace.sl_len_cm FROM shoelace WHERE (NOT (EXISTS (SELECT shoe.shoename FROM shoe WHERE (shoe.slcolor = shoelace.sl_color))));
|
||||
street | SELECT r.name, r.thepath, c.cname FROM ONLY road r, real_city c WHERE (c.outline ## r.thepath);
|
||||
toyemp | SELECT emp.name, emp.age, emp."location", (12 * emp.salary) AS annualsal FROM emp;
|
||||
(38 rows)
|
||||
(39 rows)
|
||||
|
||||
SELECT tablename, rulename, definition FROM pg_rules
|
||||
ORDER BY tablename, rulename;
|
||||
tablename | rulename | definition
|
||||
---------------+-----------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
||||
pg_settings | pg_settings_n | CREATE RULE pg_settings_n AS ON UPDATE TO pg_settings DO INSTEAD NOTHING;
|
||||
pg_settings | pg_settings_u | CREATE RULE pg_settings_u AS ON UPDATE TO pg_settings WHERE (new.name = old.name) DO SELECT set_config(old.name, new.setting, 'f'::boolean) AS set_config;
|
||||
rtest_emp | rtest_emp_del | CREATE RULE rtest_emp_del AS ON DELETE TO rtest_emp DO INSERT INTO rtest_emplog (ename, who, "action", newsal, oldsal) VALUES (old.ename, "current_user"(), 'fired '::bpchar, '$0.00'::money, old.salary);
|
||||
rtest_emp | rtest_emp_ins | CREATE RULE rtest_emp_ins AS ON INSERT TO rtest_emp DO INSERT INTO rtest_emplog (ename, who, "action", newsal, oldsal) VALUES (new.ename, "current_user"(), 'hired '::bpchar, new.salary, '$0.00'::money);
|
||||
rtest_emp | rtest_emp_upd | CREATE RULE rtest_emp_upd AS ON UPDATE TO rtest_emp WHERE (new.salary <> old.salary) DO INSERT INTO rtest_emplog (ename, who, "action", newsal, oldsal) VALUES (new.ename, "current_user"(), 'honored '::bpchar, new.salary, old.salary);
|
||||
|
|
@ -1337,5 +1340,5 @@ SELECT tablename, rulename, definition FROM pg_rules
|
|||
shoelace | shoelace_upd | CREATE RULE shoelace_upd AS ON UPDATE TO shoelace DO INSTEAD UPDATE shoelace_data SET sl_name = new.sl_name, sl_avail = new.sl_avail, sl_color = new.sl_color, sl_len = new.sl_len, sl_unit = new.sl_unit WHERE (shoelace_data.sl_name = old.sl_name);
|
||||
shoelace_data | log_shoelace | CREATE RULE log_shoelace AS ON UPDATE TO shoelace_data WHERE (new.sl_avail <> old.sl_avail) DO INSERT INTO shoelace_log (sl_name, sl_avail, log_who, log_when) VALUES (new.sl_name, new.sl_avail, 'Al Bundy'::name, 'Thu Jan 01 00:00:00 1970'::timestamp without time zone);
|
||||
shoelace_ok | shoelace_ok_ins | CREATE RULE shoelace_ok_ins AS ON INSERT TO shoelace_ok DO INSTEAD UPDATE shoelace SET sl_avail = (shoelace.sl_avail + new.ok_quant) WHERE (shoelace.sl_name = new.ok_name);
|
||||
(27 rows)
|
||||
(29 rows)
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue