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Allow psql's \df and \do commands to specify argument types.

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When dealing with overloaded function or operator names, having
to look through a long list of matches is tedious.  Let's extend
these commands to allow specification of (input) argument types
to let such results be trimmed down.  Each additional argument
is treated the same as the pattern argument of \dT and matched
against the appropriate argument's type name.

While at it, fix \dT (and these new options) to recognize the
usual notation of "foo[]" for "the array type over foo", and
to handle the special abbreviations allowed by the backend
grammar, such as "int" for "integer".

Greg Sabino Mullane, revised rather significantly by me

Discussion: https://postgr.es/m/CAKAnmmLF9Hhu02N+s7uAyLc5J1xZReg72HQUoiKhNiJV3_jACQ@mail.gmail.com
This commit is contained in:
Tom Lane
2021-04-07 23:02:16 -04:00
parent f57a2f5e03
commit a3027e1e7f
8 changed files with 374 additions and 30 deletions
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7
src/bin/psql/help.c
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@ -166,7 +166,7 @@ slashUsage(unsigned short int pager)
* Use "psql --help=commands | wc" to count correctly. It's okay to count
* the USE_READLINE line even in builds without that.
*/
output = PageOutput(133, pager ? &(pset.popt.topt) : NULL);
output = PageOutput(135, pager ? &(pset.popt.topt) : NULL);
fprintf(output, _("General\n"));
fprintf(output, _(" \\copyright show PostgreSQL usage and distribution terms\n"));
@ -240,7 +240,8 @@ slashUsage(unsigned short int pager)
fprintf(output, _(" \\des[+] [PATTERN] list foreign servers\n"));
fprintf(output, _(" \\deu[+] [PATTERN] list user mappings\n"));
fprintf(output, _(" \\dew[+] [PATTERN] list foreign-data wrappers\n"));
fprintf(output, _(" \\df[anptw][S+] [PATRN] list [only agg/normal/procedures/trigger/window] functions\n"));
fprintf(output, _(" \\df[anptw][S+] [FUNCPTRN [TYPEPTRN ...]]\n"));
fprintf(output, _(" list [only agg/normal/procedure/trigger/window] functions\n"));
fprintf(output, _(" \\dF[+] [PATTERN] list text search configurations\n"));
fprintf(output, _(" \\dFd[+] [PATTERN] list text search dictionaries\n"));
fprintf(output, _(" \\dFp[+] [PATTERN] list text search parsers\n"));
@ -251,7 +252,7 @@ slashUsage(unsigned short int pager)
fprintf(output, _(" \\dL[S+] [PATTERN] list procedural languages\n"));
fprintf(output, _(" \\dm[S+] [PATTERN] list materialized views\n"));
fprintf(output, _(" \\dn[S+] [PATTERN] list schemas\n"));
fprintf(output, _(" \\do[S] [PATTERN] list operators\n"));
fprintf(output, _(" \\do[S] [OPPTRN [TYPEPTRN [TYPEPTRN]]] list operators\n"));
fprintf(output, _(" \\dO[S+] [PATTERN] list collations\n"));
fprintf(output, _(" \\dp [PATTERN] list table, view, and sequence access privileges\n"));
fprintf(output, _(" \\dP[itn+] [PATTERN] list [only index/table] partitioned relations [n=nested]\n"));