-
+
<application>ECPG</application> - Embedded <acronym>SQL</acronym> in C
currently no variable to change that within ecpg.
- The following input formats are allowed:
-
+ shows the allowed input formats.
+
Valid input formats for <function>PGTYPESdate_from_asc</function>
-
All other characters are copied 1:1 to the output string.
- The following table indicates a few possible formats. This will give
+ indicates a few possible formats. This will give
you an idea of how to use this function. All output lines are based on
- the same date: November, 23rd, 1959.
-
+ the same date: November 23, 1959.
+
Valid input formats for <function>PGTYPESdate_fmt_asc</function>
-
day.
- The following table indicates a few possible formats. This will give
+ indicates a few possible formats. This will give
you an idea of how to use this function.
-
+
Valid input formats for <function>rdefmtdate</function>
-
specifiers are silently discarded.
- The following table contains a few examples for input strings:
-
+ contains a few examples for input strings.
+
Valid input formats for <function>PGTYPEStimestamp_from_asc</function>
-
-
+
isn
The isn module provides the standard comparison operators,
plus btree and hash indexing support for all these datatypes. In
- addition there are several specialized functions. In this table,
- isn means any one of the module's data types:
+ addition there are several specialized functions; shown in .
+ In this table,
+ isn means any one of the module's data types.
-
<filename>isn</> functions
-
+
pg_buffercache
The <structname>pg_buffercache</structname> view
- The definitions of the columns exposed by the view are:
+ The definitions of the columns exposed by the view are shown in .
-
+
id="pgbuffercache-columns">
<structname>pg_buffercache</> Columns
-
+
pgcrypto
too high a count the time to calculate a hash may be several years
— which is somewhat impractical. If the
iter_count parameter is omitted, the default iteration count is used.
- Allowed values for
iter_count depend on the algorithm:+ Allowed values for
iter_count depend on the algorithm and+ are shown in .
-
+
id="pgcrypto-icfc-table">
Iteration counts for <function>crypt()</>
- Here is a table that gives an overview of the relative slowness
+ gives an overview of the relative slowness
of different hashing algorithms.
The table shows how much time it would take to try all
combinations of characters in an 8-character password, assuming
gen_salt.
-
+
id="pgcrypto-hash-speed-table">
Hash algorithm speeds
pgcrypto uses code from the following sources:
+ informaltable>
-
+
pgrowlocks
Overview
-
+
pgrowlocks(text) returns setof record
-
+
The parameter is the name of a table. The result is a set of records,
with one row for each locked row within the table. The output columns
- are:
+ are shown in .
-
+
id="pgrowlocks-columns">
<function>pgrowlocks</> output columns
-
+
pg_stat_statements
named pg_stat_statements. This view contains one row for
each distinct query text, database ID, and user ID (up to the maximum
number of distinct statements that the module can track). The columns
- of the view are:
+ of the view are shown in .
-
+
id="pgstatstatements-columns">
<structname>pg_stat_statements</> columns
-
+
pgstattuple
to determine whether vacuum is necessary or not. The argument is the
target relation's name (optionally schema-qualified).
For example:
-
test=> SELECT * FROM pgstattuple('pg_catalog.pg_proc');
-[ RECORD 1 ]------+-------
table_len | 458752
dead_tuple_percent | 0.69
free_space | 8932
free_percent | 1.95
-
-
- The output columns are:
+
+ The output columns are described in .
-
+
id="pgstattuple-columns">
<function>pgstattuple</function> output columns
-
+
seg
- In the following table, x, y, and
+ In , x, y, and
delta denote
floating-point numbers. x and y, but
- not delta, can be preceded by a certainty indicator:
+ not delta, can be preceded by a certainty indicator.
-
<type>seg</> external representations
-
+
xml2
Description of functions
+ shows the functions provided by this module.
These functions provide straightforward XML parsing and XPath queries.
All arguments are of type text, so for brevity that is not shown.
-
+
id="xml2-functions-table">
Functions
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