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Improve psql's tab completion to handle completing attribute names in cases

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where the relation name was schema-qualified, for example
	UPDATE foo.bar SET <tab>
Also support cases where the relation name was quoted unnecessarily,
for example
	UPDATE "foo" SET <tab>

Greg Sabino Mullane, slightly simplified by myself.
REL8_5_ALPHA1_BRANCH
Tom Lane 18 years ago
parent 6fc9d4272c
commit 5787d50acc
1 changed files with 102 additions and 26 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 128
      src/bin/psql/tab-complete.c

128
src/bin/psql/tab-complete.c
Unescape View File

@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2008, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/tab-complete.c,v 1.169 2008/01/01 19:45:56 momjian Exp $
* $PostgreSQL: pgsql/src/bin/psql/tab-complete.c,v 1.170 2008/03/29 19:19:14 tgl Exp $
*/
/*----------------------------------------------------------------------
@ -53,6 +53,7 @@
#include "pqexpbuffer.h"
#include "common.h"
#include "settings.h"
#include "stringutils.h"
#ifdef HAVE_RL_FILENAME_COMPLETION_FUNCTION
#define filename_completion_function rl_filename_completion_function
@ -124,29 +125,70 @@ static int completion_max_records;
* Communication variables set by COMPLETE_WITH_FOO macros and then used by
* the completion callback functions. Ugly but there is no better way.
*/
static const char *completion_charp; /* to pass a string */
static const char *completion_charp; /* to pass a string */
static const char *const * completion_charpp; /* to pass a list of strings */
static const char *completion_info_charp; /* to pass a second string */
static const char *completion_info_charp2; /* to pass a third string */
static const SchemaQuery *completion_squery; /* to pass a SchemaQuery */
/* A couple of macros to ease typing. You can use these to complete the given
string with
1) The results from a query you pass it. (Perhaps one of those below?)
2) The results from a schema query you pass it.
3) The items from a null-pointer-terminated list.
4) A string constant
5) The list of attributes to the given table.
*/
/*
* A few macros to ease typing. You can use these to complete the given
* string with
* 1) The results from a query you pass it. (Perhaps one of those below?)
* 2) The results from a schema query you pass it.
* 3) The items from a null-pointer-terminated list.
* 4) A string constant.
* 5) The list of attributes of the given table (possibly schema-qualified).
*/
#define COMPLETE_WITH_QUERY(query) \
do { completion_charp = query; matches = completion_matches(text, complete_from_query); } while(0)
do { \
completion_charp = query; \
matches = completion_matches(text, complete_from_query); \
} while (0)
#define COMPLETE_WITH_SCHEMA_QUERY(query, addon) \
do { completion_squery = &(query); completion_charp = addon; matches = completion_matches(text, complete_from_schema_query); } while(0)
do { \
completion_squery = &(query); \
completion_charp = addon; \
matches = completion_matches(text, complete_from_schema_query); \
} while (0)
#define COMPLETE_WITH_LIST(list) \
do { completion_charpp = list; matches = completion_matches(text, complete_from_list); } while(0)
do { \
completion_charpp = list; \
matches = completion_matches(text, complete_from_list); \
} while (0)
#define COMPLETE_WITH_CONST(string) \
do { completion_charp = string; matches = completion_matches(text, complete_from_const); } while(0)
#define COMPLETE_WITH_ATTR(table, addon) \
do {completion_charp = Query_for_list_of_attributes addon; completion_info_charp = table; matches = completion_matches(text, complete_from_query); } while(0)
do { \
completion_charp = string; \
matches = completion_matches(text, complete_from_const); \
} while (0)
#define COMPLETE_WITH_ATTR(relation, addon) \
do { \
char *_completion_schema; \
char *_completion_table; \
\
_completion_schema = strtokx(relation, " \t\n\r", ".", "\"", 0, \
false, false, pset.encoding); \
(void) strtokx(NULL, " \t\n\r", ".", "\"", 0, \
false, false, pset.encoding); \
_completion_table = strtokx(NULL, " \t\n\r", ".", "\"", 0, \
false, false, pset.encoding); \
if (_completion_table == NULL) \
{ \
completion_charp = Query_for_list_of_attributes addon; \
completion_info_charp = relation; \
} \
else \
{ \
completion_charp = Query_for_list_of_attributes_with_schema addon; \
completion_info_charp = _completion_table; \
completion_info_charp2 = _completion_schema; \
} \
matches = completion_matches(text, complete_from_query); \
} while (0)
/*
* Assembly instructions for schema queries
@ -308,11 +350,12 @@ static const SchemaQuery Query_for_list_of_views = {
/*
* Queries to get lists of names of various kinds of things, possibly
* restricted to names matching a partially entered name. In these queries,
* %s will be replaced by the text entered so far (suitably escaped to
* become a SQL literal string). %d will be replaced by the length of the
* string (in unescaped form). A second %s, if present, will be replaced
* by a suitably-escaped version of the string provided in
* completion_info_charp.
* the first %s will be replaced by the text entered so far (suitably escaped
* to become a SQL literal string). %d will be replaced by the length of the
* string (in unescaped form). A second and third %s, if present, will be
* replaced by a suitably-escaped version of the string provided in
* completion_info_charp. A fourth and fifth %s are similarly replaced by
* completion_info_charp2.
*
* Beware that the allowed sequences of %s and %d are determined by
* _complete_from_query().
@ -325,9 +368,23 @@ static const SchemaQuery Query_for_list_of_views = {
" AND a.attnum > 0 "\
" AND NOT a.attisdropped "\
" AND substring(pg_catalog.quote_ident(attname),1,%d)='%s' "\
" AND pg_catalog.quote_ident(relname)='%s' "\
" AND (pg_catalog.quote_ident(relname)='%s' "\
" OR '\"' || relname || '\"'='%s') "\
" AND pg_catalog.pg_table_is_visible(c.oid)"
#define Query_for_list_of_attributes_with_schema \
"SELECT pg_catalog.quote_ident(attname) "\
" FROM pg_catalog.pg_attribute a, pg_catalog.pg_class c, pg_catalog.pg_namespace n "\
" WHERE c.oid = a.attrelid "\
" AND n.oid = c.relnamespace "\
" AND a.attnum > 0 "\
" AND NOT a.attisdropped "\
" AND substring(pg_catalog.quote_ident(attname),1,%d)='%s' "\
" AND (pg_catalog.quote_ident(relname)='%s' "\
" OR '\"' || relname || '\"' ='%s') "\
" AND (pg_catalog.quote_ident(nspname)='%s' "\
" OR '\"' || nspname || '\"' ='%s') "
#define Query_for_list_of_template_databases \
"SELECT pg_catalog.quote_ident(datname) FROM pg_catalog.pg_database "\
" WHERE substring(pg_catalog.quote_ident(datname),1,%d)='%s' and datistemplate IS TRUE"
@ -584,9 +641,10 @@ psql_completion(char *text, int start, int end)
completion_charp = NULL;
completion_charpp = NULL;
completion_info_charp = NULL;
completion_info_charp2 = NULL;
/*
* Scan the input line before our current position for the last four
* Scan the input line before our current position for the last five
* words. According to those we'll make some smart decisions on what the
* user is probably intending to type. TODO: Use strtokx() to do this.
*/
@ -2225,8 +2283,9 @@ complete_from_schema_query(const char *text, int state)
The query can be one of two kinds:
- A simple query which must contain a %d and a %s, which will be replaced
by the string length of the text and the text itself. The query may also
have another %s in it, which will be replaced by the value of
completion_info_charp.
have up to four more %s in it; the first two such will be replaced by the
value of completion_info_charp, the next two by the value of
completion_info_charp2.
or:
- A schema query used for completion of both schema and relation names;
these are more complex and must contain in the following order:
@ -2255,6 +2314,7 @@ _complete_from_query(int is_schema_query, const char *text, int state)
PQExpBufferData query_buffer;
char *e_text;
char *e_info_charp;
char *e_info_charp2;
list_index = 0;
string_length = strlen(text);
@ -2279,6 +2339,18 @@ _complete_from_query(int is_schema_query, const char *text, int state)
else
e_info_charp = NULL;
if (completion_info_charp2)
{
size_t charp_len;
charp_len = strlen(completion_info_charp2);
e_info_charp2 = pg_malloc(charp_len * 2 + 1);
PQescapeString(e_info_charp2, completion_info_charp2,
charp_len);
}
else
e_info_charp2 = NULL;
initPQExpBuffer(&query_buffer);
if (is_schema_query)
@ -2374,7 +2446,9 @@ _complete_from_query(int is_schema_query, const char *text, int state)
{
/* completion_charp is an sprintf-style format string */
appendPQExpBuffer(&query_buffer, completion_charp,
string_length, e_text, e_info_charp);
string_length, e_text,
e_info_charp, e_info_charp,
e_info_charp2, e_info_charp2);
}
/* Limit the number of records in the result */
@ -2387,6 +2461,8 @@ _complete_from_query(int is_schema_query, const char *text, int state)
free(e_text);
if (e_info_charp)
free(e_info_charp);
if (e_info_charp2)
free(e_info_charp2);
}
/* Find something that matches */

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