![]() To_timestamp and to_date skip multiple blank spaces at the beginning of the input string and around date and time values unless the FX option is used. When using the TM modifier, case-folding is done according to the rules of the function's input collation (see Section 24.2). To_timestamp and to_date ignore letter case in the input so for example MON, Mon, and mon all accept the same strings. TM suppresses trailing blanks whether or not FM is specified. In PostgreSQL, FM modifies only the next specification, while in Oracle FM affects all subsequent specifications, and repeated FM modifiers toggle fill mode on and off. Table 9.28 shows the modifier patterns for date/time formatting.įM suppresses leading zeroes and trailing blanks that would otherwise be added to make the output of a pattern be fixed-width. ![]() For example, FMMonth is the Month pattern with the FM modifier. Modifiers can be applied to any template pattern to alter its behavior. Time-zone offset from UTC (only supported in to_char) Lower case time-zone abbreviation (only supported in to_char) Upper case time-zone abbreviation (only supported in to_char) Month in lower case Roman numerals (i–xii i=January) Month in upper case Roman numerals (I–XII I=January) Julian Date (integer days since NovemBC at local midnight see Section B.7) ![]() Week number of ISO 8601 week-numbering year (01–53 the first Thursday of the year is in week 1)Ĭentury (2 digits) (the twenty-first century starts on ) Week number of year (1–53) (the first week starts on the first day of the year) Week of month (1–5) (the first week starts on the first day of the month) ISO 8601 day of the week, Monday ( 1) to Sunday ( 7) Last digit of ISO 8601 week-numbering yearįull upper case month name (blank-padded to 9 chars)įull capitalized month name (blank-padded to 9 chars)įull lower case month name (blank-padded to 9 chars)Ībbreviated upper case month name (3 chars in English, localized lengths vary)Ībbreviated capitalized month name (3 chars in English, localized lengths vary)Ībbreviated lower case month name (3 chars in English, localized lengths vary)įull upper case day name (blank-padded to 9 chars)įull capitalized day name (blank-padded to 9 chars)įull lower case day name (blank-padded to 9 chars)Ībbreviated upper case day name (3 chars in English, localized lengths vary)Ībbreviated capitalized day name (3 chars in English, localized lengths vary)Ībbreviated lower case day name (3 chars in English, localized lengths vary)ĭay of ISO 8601 week-numbering year (001–371 day 1 of the year is Monday of the first ISO week)ĭay of the week, Sunday ( 1) to Saturday ( 7) Last 2 digits of ISO 8601 week-numbering year ![]() Last 3 digits of ISO 8601 week-numbering year ISO 8601 week-numbering year (4 or more digits) (See also to_timestamp(double precision) in Table 9.33.) To_timestamp ( text, text ) → timestamp with time zoneĬonverts string to time stamp according to the given format. To_char(interval '15h 2m 12s', 'HH24:MI:SS') → 15:02:12Ĭonverts number to string according to the given format available for integer, bigint, numeric, real, double precision.Ĭonverts string to date according to the given format.Ĭonverts string to numeric according to the given format. To_char(timestamp ' 17:31:12.66', 'HH12:MI:SS') → 05:31:12Ĭonverts interval to string according to the given format. Pretty fast, but iterating on the replacements is very costly.To_char ( timestamp with time zone, text ) → textĬonverts time stamp to string according to the given format. In a plpgsql implementation, searching with the alternation appears to be (tested up to 1000, knowing that they get combined into a single regularĮxpression) and many actual replacements occurring. This Perl function appears to be very fast, even with many strings to replace These fiveĬREATE FUNCTION multi_replace ( string text, orig text, repl text ) RETURNS text AS $BODY $ my ( $string, $orig, $repl ) = my %subs if ( != ) /g return $string $BODY $ language plperl strict immutable Job, and it seems the popular answer when searching forĪ solution on the web, but in the general case, they produce flawed results ifĪny inner replacement happens to create a match for other outerĪs an example, consider the necessary conversion of characters into HTMLĮntities when creating an HTML fragment from a raw text. In some cases, nested or successive replace() calls might do the Regexp_replace(string, 'foo|bar', 'baz', 'g') would replace bothįoo and bar by baz, but it cannot be instructed to replace foo by Multiple strings in a single pass, but it can’t do multiple In PostgreSQL, regexp_replace does support alternations to search for Or the substitutions operators with regular expressions in Python or Perl Multiple strings each by its own independent replacement, like for Select replace('the string is bar', 'bar', 'foo') īut there isn’t a PostgreSQL core function to substitute ![]()
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