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describe.c
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/*
* psql - the PostgreSQL interactive terminal
*
* Support for the various \d ("describe") commands. Note that the current
* expectation is that all functions in this file will succeed when working
* with servers of versions 9.2 and up. It's okay to omit irrelevant
* information for an old server, but not to fail outright. (But failing
* against a pre-9.2 server is allowed.)
*
* Copyright (c) 2000-2022, PostgreSQL Global Development Group
*
* src/bin/psql/describe.c
*/
#include "postgres_fe.h"
#include <ctype.h>
#include "catalog/pg_am.h"
#include "catalog/pg_attribute_d.h"
#include "catalog/pg_cast_d.h"
#include "catalog/pg_class_d.h"
#include "catalog/pg_default_acl_d.h"
#include "common.h"
#include "common/logging.h"
#include "describe.h"
#include "fe_utils/mbprint.h"
#include "fe_utils/print.h"
#include "fe_utils/string_utils.h"
#include "settings.h"
#include "variables.h"
static const char *map_typename_pattern(const char *pattern);
static bool describeOneTableDetails(const char *schemaname,
const char *relationname,
const char *oid,
bool verbose);
static void add_tablespace_footer(printTableContent *const cont, char relkind,
Oid tablespace, const bool newline);
static void add_role_attribute(PQExpBuffer buf, const char *const str);
static bool listTSParsersVerbose(const char *pattern);
static bool describeOneTSParser(const char *oid, const char *nspname,
const char *prsname);
static bool listTSConfigsVerbose(const char *pattern);
static bool describeOneTSConfig(const char *oid, const char *nspname,
const char *cfgname,
const char *pnspname, const char *prsname);
static void printACLColumn(PQExpBuffer buf, const char *colname);
static bool listOneExtensionContents(const char *extname, const char *oid);
static bool validateSQLNamePattern(PQExpBuffer buf, const char *pattern,
bool have_where, bool force_escape,
const char *schemavar, const char *namevar,
const char *altnamevar,
const char *visibilityrule,
bool *added_clause, int maxparts);
/*----------------
* Handlers for various slash commands displaying some sort of list
* of things in the database.
*
* Note: try to format the queries to look nice in -E output.
*----------------
*/
/*
* \da
* Takes an optional regexp to select particular aggregates
*/
bool
describeAggregates(const char *pattern, bool verbose, bool showSystem)
{
PQExpBufferData buf;
PGresult *res;
printQueryOpt myopt = pset.popt;
initPQExpBuffer(&buf);
printfPQExpBuffer(&buf,
"SELECT n.nspname as \"%s\",\n"
" p.proname AS \"%s\",\n"
" pg_catalog.format_type(p.prorettype, NULL) AS \"%s\",\n"
" CASE WHEN p.pronargs = 0\n"
" THEN CAST('*' AS pg_catalog.text)\n"
" ELSE pg_catalog.pg_get_function_arguments(p.oid)\n"
" END AS \"%s\",\n",
gettext_noop("Schema"),
gettext_noop("Name"),
gettext_noop("Result data type"),
gettext_noop("Argument data types"));
if (pset.sversion >= 110000)
appendPQExpBuffer(&buf,
" pg_catalog.obj_description(p.oid, 'pg_proc') as \"%s\"\n"
"FROM pg_catalog.pg_proc p\n"
" LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace\n"
"WHERE p.prokind = 'a'\n",
gettext_noop("Description"));
else
appendPQExpBuffer(&buf,
" pg_catalog.obj_description(p.oid, 'pg_proc') as \"%s\"\n"
"FROM pg_catalog.pg_proc p\n"
" LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace\n"
"WHERE p.proisagg\n",
gettext_noop("Description"));
if (!showSystem && !pattern)
appendPQExpBufferStr(&buf, " AND n.nspname <> 'pg_catalog'\n"
" AND n.nspname <> 'information_schema'\n");
if (!validateSQLNamePattern(&buf, pattern, true, false,
"n.nspname", "p.proname", NULL,
"pg_catalog.pg_function_is_visible(p.oid)",
NULL, 3))
{
termPQExpBuffer(&buf);
return false;
}
appendPQExpBufferStr(&buf, "ORDER BY 1, 2, 4;");
res = PSQLexec(buf.data);
termPQExpBuffer(&buf);
if (!res)
return false;
myopt.nullPrint = NULL;
myopt.title = _("List of aggregate functions");
myopt.translate_header = true;
printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
PQclear(res);
return true;
}
/*
* \dA
* Takes an optional regexp to select particular access methods
*/
bool
describeAccessMethods(const char *pattern, bool verbose)
{
PQExpBufferData buf;
PGresult *res;
printQueryOpt myopt = pset.popt;
static const bool translate_columns[] = {false, true, false, false};
if (pset.sversion < 90600)
{
char sverbuf[32];
pg_log_error("The server (version %s) does not support access methods.",
formatPGVersionNumber(pset.sversion, false,
sverbuf, sizeof(sverbuf)));
return true;
}
initPQExpBuffer(&buf);
printfPQExpBuffer(&buf,
"SELECT amname AS \"%s\",\n"
" CASE amtype"
" WHEN 'i' THEN '%s'"
" WHEN 't' THEN '%s'"
" END AS \"%s\"",
gettext_noop("Name"),
gettext_noop("Index"),
gettext_noop("Table"),
gettext_noop("Type"));
if (verbose)
{
appendPQExpBuffer(&buf,
",\n amhandler AS \"%s\",\n"
" pg_catalog.obj_description(oid, 'pg_am') AS \"%s\"",
gettext_noop("Handler"),
gettext_noop("Description"));
}
appendPQExpBufferStr(&buf,
"\nFROM pg_catalog.pg_am\n");
if (!validateSQLNamePattern(&buf, pattern, false, false,
NULL, "amname", NULL,
NULL,
NULL, 1))
{
termPQExpBuffer(&buf);
return false;
}
appendPQExpBufferStr(&buf, "ORDER BY 1;");
res = PSQLexec(buf.data);
termPQExpBuffer(&buf);
if (!res)
return false;
myopt.nullPrint = NULL;
myopt.title = _("List of access methods");
myopt.translate_header = true;
myopt.translate_columns = translate_columns;
myopt.n_translate_columns = lengthof(translate_columns);
printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
PQclear(res);
return true;
}
/*
* \db
* Takes an optional regexp to select particular tablespaces
*/
bool
describeTablespaces(const char *pattern, bool verbose)
{
PQExpBufferData buf;
PGresult *res;
printQueryOpt myopt = pset.popt;
initPQExpBuffer(&buf);
printfPQExpBuffer(&buf,
"SELECT spcname AS \"%s\",\n"
" pg_catalog.pg_get_userbyid(spcowner) AS \"%s\",\n"
" pg_catalog.pg_tablespace_location(oid) AS \"%s\"",
gettext_noop("Name"),
gettext_noop("Owner"),
gettext_noop("Location"));
if (verbose)
{
appendPQExpBufferStr(&buf, ",\n ");
printACLColumn(&buf, "spcacl");
appendPQExpBuffer(&buf,
",\n spcoptions AS \"%s\""
",\n pg_catalog.pg_size_pretty(pg_catalog.pg_tablespace_size(oid)) AS \"%s\""
",\n pg_catalog.shobj_description(oid, 'pg_tablespace') AS \"%s\"",
gettext_noop("Options"),
gettext_noop("Size"),
gettext_noop("Description"));
}
appendPQExpBufferStr(&buf,
"\nFROM pg_catalog.pg_tablespace\n");
if (!validateSQLNamePattern(&buf, pattern, false, false,
NULL, "spcname", NULL,
NULL,
NULL, 1))
{
termPQExpBuffer(&buf);
return false;
}
appendPQExpBufferStr(&buf, "ORDER BY 1;");
res = PSQLexec(buf.data);
termPQExpBuffer(&buf);
if (!res)
return false;
myopt.nullPrint = NULL;
myopt.title = _("List of tablespaces");
myopt.translate_header = true;
printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
PQclear(res);
return true;
}
/*
* \df
* Takes an optional regexp to select particular functions.
*
* As with \d, you can specify the kinds of functions you want:
*
* a for aggregates
* n for normal
* p for procedure
* t for trigger
* w for window
*
* and you can mix and match these in any order.
*/
bool
describeFunctions(const char *functypes, const char *func_pattern,
char **arg_patterns, int num_arg_patterns,
bool verbose, bool showSystem)
{
bool showAggregate = strchr(functypes, 'a') != NULL;
bool showNormal = strchr(functypes, 'n') != NULL;
bool showProcedure = strchr(functypes, 'p') != NULL;
bool showTrigger = strchr(functypes, 't') != NULL;
bool showWindow = strchr(functypes, 'w') != NULL;
bool have_where;
PQExpBufferData buf;
PGresult *res;
printQueryOpt myopt = pset.popt;
static const bool translate_columns[] = {false, false, false, false, true, true, true, false, true, false, false, false, false};
/* No "Parallel" column before 9.6 */
static const bool translate_columns_pre_96[] = {false, false, false, false, true, true, false, true, false, false, false, false};
if (strlen(functypes) != strspn(functypes, "anptwS+"))
{
pg_log_error("\\df only takes [anptwS+] as options");
return true;
}
if (showProcedure && pset.sversion < 110000)
{
char sverbuf[32];
pg_log_error("\\df does not take a \"%c\" option with server version %s",
'p',
formatPGVersionNumber(pset.sversion, false,
sverbuf, sizeof(sverbuf)));
return true;
}
if (!showAggregate && !showNormal && !showProcedure && !showTrigger && !showWindow)
{
showAggregate = showNormal = showTrigger = showWindow = true;
if (pset.sversion >= 110000)
showProcedure = true;
}
initPQExpBuffer(&buf);
printfPQExpBuffer(&buf,
"SELECT n.nspname as \"%s\",\n"
" p.proname as \"%s\",\n",
gettext_noop("Schema"),
gettext_noop("Name"));
if (pset.sversion >= 110000)
appendPQExpBuffer(&buf,
" pg_catalog.pg_get_function_result(p.oid) as \"%s\",\n"
" pg_catalog.pg_get_function_arguments(p.oid) as \"%s\",\n"
" CASE p.prokind\n"
" WHEN 'a' THEN '%s'\n"
" WHEN 'w' THEN '%s'\n"
" WHEN 'p' THEN '%s'\n"
" ELSE '%s'\n"
" END as \"%s\"",
gettext_noop("Result data type"),
gettext_noop("Argument data types"),
/* translator: "agg" is short for "aggregate" */
gettext_noop("agg"),
gettext_noop("window"),
gettext_noop("proc"),
gettext_noop("func"),
gettext_noop("Type"));
else
appendPQExpBuffer(&buf,
" pg_catalog.pg_get_function_result(p.oid) as \"%s\",\n"
" pg_catalog.pg_get_function_arguments(p.oid) as \"%s\",\n"
" CASE\n"
" WHEN p.proisagg THEN '%s'\n"
" WHEN p.proiswindow THEN '%s'\n"
" WHEN p.prorettype = 'pg_catalog.trigger'::pg_catalog.regtype THEN '%s'\n"
" ELSE '%s'\n"
" END as \"%s\"",
gettext_noop("Result data type"),
gettext_noop("Argument data types"),
/* translator: "agg" is short for "aggregate" */
gettext_noop("agg"),
gettext_noop("window"),
gettext_noop("trigger"),
gettext_noop("func"),
gettext_noop("Type"));
if (verbose)
{
appendPQExpBuffer(&buf,
",\n CASE\n"
" WHEN p.provolatile = 'i' THEN '%s'\n"
" WHEN p.provolatile = 's' THEN '%s'\n"
" WHEN p.provolatile = 'v' THEN '%s'\n"
" END as \"%s\"",
gettext_noop("immutable"),
gettext_noop("stable"),
gettext_noop("volatile"),
gettext_noop("Volatility"));
if (pset.sversion >= 90600)
appendPQExpBuffer(&buf,
",\n CASE\n"
" WHEN p.proparallel = 'r' THEN '%s'\n"
" WHEN p.proparallel = 's' THEN '%s'\n"
" WHEN p.proparallel = 'u' THEN '%s'\n"
" END as \"%s\"",
gettext_noop("restricted"),
gettext_noop("safe"),
gettext_noop("unsafe"),
gettext_noop("Parallel"));
appendPQExpBuffer(&buf,
",\n pg_catalog.pg_get_userbyid(p.proowner) as \"%s\""
",\n CASE WHEN prosecdef THEN '%s' ELSE '%s' END AS \"%s\"",
gettext_noop("Owner"),
gettext_noop("definer"),
gettext_noop("invoker"),
gettext_noop("Security"));
appendPQExpBufferStr(&buf, ",\n ");
printACLColumn(&buf, "p.proacl");
appendPQExpBuffer(&buf,
",\n l.lanname as \"%s\"",
gettext_noop("Language"));
if (pset.sversion >= 140000)
appendPQExpBuffer(&buf,
",\n COALESCE(pg_catalog.pg_get_function_sqlbody(p.oid), p.prosrc) as \"%s\"",
gettext_noop("Source code"));
else
appendPQExpBuffer(&buf,
",\n p.prosrc as \"%s\"",
gettext_noop("Source code"));
appendPQExpBuffer(&buf,
",\n pg_catalog.obj_description(p.oid, 'pg_proc') as \"%s\"",
gettext_noop("Description"));
}
appendPQExpBufferStr(&buf,
"\nFROM pg_catalog.pg_proc p"
"\n LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace\n");
for (int i = 0; i < num_arg_patterns; i++)
{
appendPQExpBuffer(&buf,
" LEFT JOIN pg_catalog.pg_type t%d ON t%d.oid = p.proargtypes[%d]\n"
" LEFT JOIN pg_catalog.pg_namespace nt%d ON nt%d.oid = t%d.typnamespace\n",
i, i, i, i, i, i);
}
if (verbose)
appendPQExpBufferStr(&buf,
" LEFT JOIN pg_catalog.pg_language l ON l.oid = p.prolang\n");
have_where = false;
/* filter by function type, if requested */
if (showNormal && showAggregate && showProcedure && showTrigger && showWindow)
/* Do nothing */ ;
else if (showNormal)
{
if (!showAggregate)
{
if (have_where)
appendPQExpBufferStr(&buf, " AND ");
else
{
appendPQExpBufferStr(&buf, "WHERE ");
have_where = true;
}
if (pset.sversion >= 110000)
appendPQExpBufferStr(&buf, "p.prokind <> 'a'\n");
else
appendPQExpBufferStr(&buf, "NOT p.proisagg\n");
}
if (!showProcedure && pset.sversion >= 110000)
{
if (have_where)
appendPQExpBufferStr(&buf, " AND ");
else
{
appendPQExpBufferStr(&buf, "WHERE ");
have_where = true;
}
appendPQExpBufferStr(&buf, "p.prokind <> 'p'\n");
}
if (!showTrigger)
{
if (have_where)
appendPQExpBufferStr(&buf, " AND ");
else
{
appendPQExpBufferStr(&buf, "WHERE ");
have_where = true;
}
appendPQExpBufferStr(&buf, "p.prorettype <> 'pg_catalog.trigger'::pg_catalog.regtype\n");
}
if (!showWindow)
{
if (have_where)
appendPQExpBufferStr(&buf, " AND ");
else
{
appendPQExpBufferStr(&buf, "WHERE ");
have_where = true;
}
if (pset.sversion >= 110000)
appendPQExpBufferStr(&buf, "p.prokind <> 'w'\n");
else
appendPQExpBufferStr(&buf, "NOT p.proiswindow\n");
}
}
else
{
bool needs_or = false;
appendPQExpBufferStr(&buf, "WHERE (\n ");
have_where = true;
/* Note: at least one of these must be true ... */
if (showAggregate)
{
if (pset.sversion >= 110000)
appendPQExpBufferStr(&buf, "p.prokind = 'a'\n");
else
appendPQExpBufferStr(&buf, "p.proisagg\n");
needs_or = true;
}
if (showTrigger)
{
if (needs_or)
appendPQExpBufferStr(&buf, " OR ");
appendPQExpBufferStr(&buf,
"p.prorettype = 'pg_catalog.trigger'::pg_catalog.regtype\n");
needs_or = true;
}
if (showProcedure)
{
if (needs_or)
appendPQExpBufferStr(&buf, " OR ");
appendPQExpBufferStr(&buf, "p.prokind = 'p'\n");
needs_or = true;
}
if (showWindow)
{
if (needs_or)
appendPQExpBufferStr(&buf, " OR ");
if (pset.sversion >= 110000)
appendPQExpBufferStr(&buf, "p.prokind = 'w'\n");
else
appendPQExpBufferStr(&buf, "p.proiswindow\n");
}
appendPQExpBufferStr(&buf, " )\n");
}
if (!validateSQLNamePattern(&buf, func_pattern, have_where, false,
"n.nspname", "p.proname", NULL,
"pg_catalog.pg_function_is_visible(p.oid)",
NULL, 3))
goto error_return;
for (int i = 0; i < num_arg_patterns; i++)
{
if (strcmp(arg_patterns[i], "-") != 0)
{
/*
* Match type-name patterns against either internal or external
* name, like \dT. Unlike \dT, there seems no reason to
* discriminate against arrays or composite types.
*/
char nspname[64];
char typname[64];
char ft[64];
char tiv[64];
snprintf(nspname, sizeof(nspname), "nt%d.nspname", i);
snprintf(typname, sizeof(typname), "t%d.typname", i);
snprintf(ft, sizeof(ft),
"pg_catalog.format_type(t%d.oid, NULL)", i);
snprintf(tiv, sizeof(tiv),
"pg_catalog.pg_type_is_visible(t%d.oid)", i);
if (!validateSQLNamePattern(&buf,
map_typename_pattern(arg_patterns[i]),
true, false,
nspname, typname, ft, tiv,
NULL, 3))
goto error_return;
}
else
{
/* "-" pattern specifies no such parameter */
appendPQExpBuffer(&buf, " AND t%d.typname IS NULL\n", i);
}
}
if (!showSystem && !func_pattern)
appendPQExpBufferStr(&buf, " AND n.nspname <> 'pg_catalog'\n"
" AND n.nspname <> 'information_schema'\n");
appendPQExpBufferStr(&buf, "ORDER BY 1, 2, 4;");
res = PSQLexec(buf.data);
termPQExpBuffer(&buf);
if (!res)
return false;
myopt.nullPrint = NULL;
myopt.title = _("List of functions");
myopt.translate_header = true;
if (pset.sversion >= 90600)
{
myopt.translate_columns = translate_columns;
myopt.n_translate_columns = lengthof(translate_columns);
}
else
{
myopt.translate_columns = translate_columns_pre_96;
myopt.n_translate_columns = lengthof(translate_columns_pre_96);
}
printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
PQclear(res);
return true;
error_return:
termPQExpBuffer(&buf);
return false;
}
/*
* \dT
* describe types
*/
bool
describeTypes(const char *pattern, bool verbose, bool showSystem)
{
PQExpBufferData buf;
PGresult *res;
printQueryOpt myopt = pset.popt;
initPQExpBuffer(&buf);
printfPQExpBuffer(&buf,
"SELECT n.nspname as \"%s\",\n"
" pg_catalog.format_type(t.oid, NULL) AS \"%s\",\n",
gettext_noop("Schema"),
gettext_noop("Name"));
if (verbose)
{
appendPQExpBuffer(&buf,
" t.typname AS \"%s\",\n"
" CASE WHEN t.typrelid != 0\n"
" THEN CAST('tuple' AS pg_catalog.text)\n"
" WHEN t.typlen < 0\n"
" THEN CAST('var' AS pg_catalog.text)\n"
" ELSE CAST(t.typlen AS pg_catalog.text)\n"
" END AS \"%s\",\n"
" pg_catalog.array_to_string(\n"
" ARRAY(\n"
" SELECT e.enumlabel\n"
" FROM pg_catalog.pg_enum e\n"
" WHERE e.enumtypid = t.oid\n"
" ORDER BY e.enumsortorder\n"
" ),\n"
" E'\\n'\n"
" ) AS \"%s\",\n"
" pg_catalog.pg_get_userbyid(t.typowner) AS \"%s\",\n",
gettext_noop("Internal name"),
gettext_noop("Size"),
gettext_noop("Elements"),
gettext_noop("Owner"));
printACLColumn(&buf, "t.typacl");
appendPQExpBufferStr(&buf, ",\n ");
}
appendPQExpBuffer(&buf,
" pg_catalog.obj_description(t.oid, 'pg_type') as \"%s\"\n",
gettext_noop("Description"));
appendPQExpBufferStr(&buf, "FROM pg_catalog.pg_type t\n"
" LEFT JOIN pg_catalog.pg_namespace n ON n.oid = t.typnamespace\n");
/*
* do not include complex types (typrelid!=0) unless they are standalone
* composite types
*/
appendPQExpBufferStr(&buf, "WHERE (t.typrelid = 0 ");
appendPQExpBufferStr(&buf, "OR (SELECT c.relkind = " CppAsString2(RELKIND_COMPOSITE_TYPE)
" FROM pg_catalog.pg_class c "
"WHERE c.oid = t.typrelid))\n");
/*
* do not include array types unless the pattern contains []
*/
if (pattern == NULL || strstr(pattern, "[]") == NULL)
appendPQExpBufferStr(&buf, " AND NOT EXISTS(SELECT 1 FROM pg_catalog.pg_type el WHERE el.oid = t.typelem AND el.typarray = t.oid)\n");
if (!showSystem && !pattern)
appendPQExpBufferStr(&buf, " AND n.nspname <> 'pg_catalog'\n"
" AND n.nspname <> 'information_schema'\n");
/* Match name pattern against either internal or external name */
if (!validateSQLNamePattern(&buf, map_typename_pattern(pattern),
true, false,
"n.nspname", "t.typname",
"pg_catalog.format_type(t.oid, NULL)",
"pg_catalog.pg_type_is_visible(t.oid)",
NULL, 3))
{
termPQExpBuffer(&buf);
return false;
}
appendPQExpBufferStr(&buf, "ORDER BY 1, 2;");
res = PSQLexec(buf.data);
termPQExpBuffer(&buf);
if (!res)
return false;
myopt.nullPrint = NULL;
myopt.title = _("List of data types");
myopt.translate_header = true;
printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
PQclear(res);
return true;
}
/*
* Map some variant type names accepted by the backend grammar into
* canonical type names.
*
* Helper for \dT and other functions that take typename patterns.
* This doesn't completely mask the fact that these names are special;
* for example, a pattern of "dec*" won't magically match "numeric".
* But it goes a long way to reduce the surprise factor.
*/
static const char *
map_typename_pattern(const char *pattern)
{
static const char *const typename_map[] = {
/*
* These names are accepted by gram.y, although they are neither the
* "real" name seen in pg_type nor the canonical name printed by
* format_type().
*/
"decimal", "numeric",
"float", "double precision",
"int", "integer",
/*
* We also have to map the array names for cases where the canonical
* name is different from what pg_type says.
*/
"bool[]", "boolean[]",
"decimal[]", "numeric[]",
"float[]", "double precision[]",
"float4[]", "real[]",
"float8[]", "double precision[]",
"int[]", "integer[]",
"int2[]", "smallint[]",
"int4[]", "integer[]",
"int8[]", "bigint[]",
"time[]", "time without time zone[]",
"timetz[]", "time with time zone[]",
"timestamp[]", "timestamp without time zone[]",
"timestamptz[]", "timestamp with time zone[]",
"varbit[]", "bit varying[]",
"varchar[]", "character varying[]",
NULL
};
if (pattern == NULL)
return NULL;
for (int i = 0; typename_map[i] != NULL; i += 2)
{
if (pg_strcasecmp(pattern, typename_map[i]) == 0)
return typename_map[i + 1];
}
return pattern;
}
/*
* \do
* Describe operators
*/
bool
describeOperators(const char *oper_pattern,
char **arg_patterns, int num_arg_patterns,
bool verbose, bool showSystem)
{
PQExpBufferData buf;
PGresult *res;
printQueryOpt myopt = pset.popt;
initPQExpBuffer(&buf);
/*
* Note: before Postgres 9.1, we did not assign comments to any built-in
* operators, preferring to let the comment on the underlying function
* suffice. The coalesce() on the obj_description() calls below supports
* this convention by providing a fallback lookup of a comment on the
* operator's function. Since 9.1 there is a policy that every built-in
* operator should have a comment; so the coalesce() is no longer
* necessary so far as built-in operators are concerned. We keep it
* anyway, for now, because third-party modules may still be following the
* old convention.
*
* The support for postfix operators in this query is dead code as of
* Postgres 14, but we need to keep it for as long as we support talking
* to pre-v14 servers.
*/
printfPQExpBuffer(&buf,
"SELECT n.nspname as \"%s\",\n"
" o.oprname AS \"%s\",\n"
" CASE WHEN o.oprkind='l' THEN NULL ELSE pg_catalog.format_type(o.oprleft, NULL) END AS \"%s\",\n"
" CASE WHEN o.oprkind='r' THEN NULL ELSE pg_catalog.format_type(o.oprright, NULL) END AS \"%s\",\n"
" pg_catalog.format_type(o.oprresult, NULL) AS \"%s\",\n",
gettext_noop("Schema"),
gettext_noop("Name"),
gettext_noop("Left arg type"),
gettext_noop("Right arg type"),
gettext_noop("Result type"));
if (verbose)
appendPQExpBuffer(&buf,
" o.oprcode AS \"%s\",\n",
gettext_noop("Function"));
appendPQExpBuffer(&buf,
" coalesce(pg_catalog.obj_description(o.oid, 'pg_operator'),\n"
" pg_catalog.obj_description(o.oprcode, 'pg_proc')) AS \"%s\"\n"
"FROM pg_catalog.pg_operator o\n"
" LEFT JOIN pg_catalog.pg_namespace n ON n.oid = o.oprnamespace\n",
gettext_noop("Description"));
if (num_arg_patterns >= 2)
{
num_arg_patterns = 2; /* ignore any additional arguments */
appendPQExpBufferStr(&buf,
" LEFT JOIN pg_catalog.pg_type t0 ON t0.oid = o.oprleft\n"
" LEFT JOIN pg_catalog.pg_namespace nt0 ON nt0.oid = t0.typnamespace\n"
" LEFT JOIN pg_catalog.pg_type t1 ON t1.oid = o.oprright\n"
" LEFT JOIN pg_catalog.pg_namespace nt1 ON nt1.oid = t1.typnamespace\n");
}
else if (num_arg_patterns == 1)
{
appendPQExpBufferStr(&buf,
" LEFT JOIN pg_catalog.pg_type t0 ON t0.oid = o.oprright\n"
" LEFT JOIN pg_catalog.pg_namespace nt0 ON nt0.oid = t0.typnamespace\n");
}
if (!showSystem && !oper_pattern)
appendPQExpBufferStr(&buf, "WHERE n.nspname <> 'pg_catalog'\n"
" AND n.nspname <> 'information_schema'\n");
if (!validateSQLNamePattern(&buf, oper_pattern,
!showSystem && !oper_pattern, true,
"n.nspname", "o.oprname", NULL,
"pg_catalog.pg_operator_is_visible(o.oid)",
NULL, 3))
goto error_return;
if (num_arg_patterns == 1)
appendPQExpBufferStr(&buf, " AND o.oprleft = 0\n");
for (int i = 0; i < num_arg_patterns; i++)
{
if (strcmp(arg_patterns[i], "-") != 0)
{
/*
* Match type-name patterns against either internal or external
* name, like \dT. Unlike \dT, there seems no reason to
* discriminate against arrays or composite types.
*/
char nspname[64];
char typname[64];
char ft[64];
char tiv[64];
snprintf(nspname, sizeof(nspname), "nt%d.nspname", i);
snprintf(typname, sizeof(typname), "t%d.typname", i);
snprintf(ft, sizeof(ft),
"pg_catalog.format_type(t%d.oid, NULL)", i);
snprintf(tiv, sizeof(tiv),
"pg_catalog.pg_type_is_visible(t%d.oid)", i);
if (!validateSQLNamePattern(&buf,
map_typename_pattern(arg_patterns[i]),
true, false,
nspname, typname, ft, tiv,
NULL, 3))
goto error_return;
}
else
{
/* "-" pattern specifies no such parameter */
appendPQExpBuffer(&buf, " AND t%d.typname IS NULL\n", i);
}
}
appendPQExpBufferStr(&buf, "ORDER BY 1, 2, 3, 4;");
res = PSQLexec(buf.data);
termPQExpBuffer(&buf);
if (!res)
return false;
myopt.nullPrint = NULL;
myopt.title = _("List of operators");
myopt.translate_header = true;
printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
PQclear(res);
return true;
error_return:
termPQExpBuffer(&buf);
return false;
}
/*
* listAllDbs
*
* for \l, \list, and -l switch
*/
bool
listAllDbs(const char *pattern, bool verbose)
{
PGresult *res;
PQExpBufferData buf;
printQueryOpt myopt = pset.popt;
initPQExpBuffer(&buf);
printfPQExpBuffer(&buf,
"SELECT d.datname as \"%s\",\n"
" pg_catalog.pg_get_userbyid(d.datdba) as \"%s\",\n"
" pg_catalog.pg_encoding_to_char(d.encoding) as \"%s\",\n"
" d.datcollate as \"%s\",\n"
" d.datctype as \"%s\",\n",
gettext_noop("Name"),
gettext_noop("Owner"),
gettext_noop("Encoding"),
gettext_noop("Collate"),
gettext_noop("Ctype"));
if (pset.sversion >= 150000)
appendPQExpBuffer(&buf,
" d.daticulocale as \"%s\",\n"
" CASE d.datlocprovider WHEN 'c' THEN 'libc' WHEN 'i' THEN 'icu' END AS \"%s\",\n",
gettext_noop("ICU Locale"),
gettext_noop("Locale Provider"));
else
appendPQExpBuffer(&buf,
" NULL as \"%s\",\n"
" 'libc' AS \"%s\",\n",
gettext_noop("ICU Locale"),
gettext_noop("Locale Provider"));
appendPQExpBufferStr(&buf, " ");
printACLColumn(&buf, "d.datacl");
if (verbose)
appendPQExpBuffer(&buf,
",\n CASE WHEN pg_catalog.has_database_privilege(d.datname, 'CONNECT')\n"
" THEN pg_catalog.pg_size_pretty(pg_catalog.pg_database_size(d.datname))\n"
" ELSE 'No Access'\n"
" END as \"%s\""
",\n t.spcname as \"%s\""
",\n pg_catalog.shobj_description(d.oid, 'pg_database') as \"%s\"",
gettext_noop("Size"),
gettext_noop("Tablespace"),
gettext_noop("Description"));
appendPQExpBufferStr(&buf,
"\nFROM pg_catalog.pg_database d\n");
if (verbose)
appendPQExpBufferStr(&buf,
" JOIN pg_catalog.pg_tablespace t on d.dattablespace = t.oid\n");
if (pattern)
{
if (!validateSQLNamePattern(&buf, pattern, false, false,
NULL, "d.datname", NULL, NULL,
NULL, 1))
{
termPQExpBuffer(&buf);
return false;
}
}
appendPQExpBufferStr(&buf, "ORDER BY 1;");
res = PSQLexec(buf.data);
termPQExpBuffer(&buf);
if (!res)
return false;
myopt.nullPrint = NULL;
myopt.title = _("List of databases");
myopt.translate_header = true;
printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
PQclear(res);
return true;
}
/*