diff --git a/doc/src/sgml/ref/psql-ref.sgml b/doc/src/sgml/ref/psql-ref.sgml
index a6370014987d5d69f4cfda862b93cd182d705c15..a33e460bca08dc00d0e34140924545baf3faaf0c 100644
--- a/doc/src/sgml/ref/psql-ref.sgml
+++ b/doc/src/sgml/ref/psql-ref.sgml
@@ -2235,6 +2235,18 @@ lo_import 152801
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><literal>pager_min_lines</literal></term>
+ <listitem>
+ <para>
+ If <literal>pager_min_lines</> is set to a number greater than the
+ page height, the pager program will not be called unless there are
+ at least this many lines of output to show. The default setting
+ is 0.
+ </para>
+ </listitem>
+ </varlistentry>
+
<varlistentry>
<term><literal>recordsep</literal></term>
<listitem>
diff --git a/src/bin/psql/command.c b/src/bin/psql/command.c
index 7c9f28dee067efb992612f3e6f4758eefa999d00..e64c033bf8c474e48ef4e71f3a186f7529cb2710 100644
--- a/src/bin/psql/command.c
+++ b/src/bin/psql/command.c
@@ -1071,7 +1071,8 @@ exec_command(const char *cmd,
static const char *const my_list[] = {
"border", "columns", "expanded", "fieldsep", "fieldsep_zero",
"footer", "format", "linestyle", "null",
- "numericlocale", "pager", "recordsep", "recordsep_zero",
+ "numericlocale", "pager", "pager_min_lines",
+ "recordsep", "recordsep_zero",
"tableattr", "title", "tuples_only",
"unicode_border_linestyle",
"unicode_column_linestyle",
@@ -1265,7 +1266,7 @@ exec_command(const char *cmd,
lines++;
}
- output = PageOutput(lineno, pset.popt.topt.pager);
+ output = PageOutput(lineno, &(pset.popt.topt));
is_pager = true;
}
else
@@ -2519,6 +2520,13 @@ do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
popt->topt.pager = 1;
}
+ /* set minimum lines for pager use */
+ else if (strcmp(param, "pager_min_lines") == 0)
+ {
+ if (value)
+ popt->topt.pager_min_lines = atoi(value);
+ }
+
/* disable "(x rows)" footer */
else if (strcmp(param, "footer") == 0)
{
@@ -2640,6 +2648,13 @@ printPsetInfo(const char *param, struct printQueryOpt *popt)
printf(_("Pager usage is off.\n"));
}
+ /* show minimum lines for pager use */
+ else if (strcmp(param, "pager_min_lines") == 0)
+ {
+ printf(_("Pager won't be used for less than %d lines\n"),
+ popt->topt.pager_min_lines);
+ }
+
/* show record separator for unaligned text */
else if (strcmp(param, "recordsep") == 0)
{
@@ -2792,6 +2807,8 @@ pset_value_string(const char *param, struct printQueryOpt *popt)
return pstrdup(pset_bool_string(popt->topt.numericLocale));
else if (strcmp(param, "pager") == 0)
return psprintf("%d", popt->topt.pager);
+ else if (strcmp(param, "pager_min_lines") == 0)
+ return psprintf("%d", popt->topt.pager_min_lines);
else if (strcmp(param, "recordsep") == 0)
return pset_quoted_string(popt->topt.recordSep.separator
? popt->topt.recordSep.separator
diff --git a/src/bin/psql/common.c b/src/bin/psql/common.c
index 15488ff035726951148523e20d539ed33885447e..2e7d9a45cb388de2efb8429cf0b593f11f187d68 100644
--- a/src/bin/psql/common.c
+++ b/src/bin/psql/common.c
@@ -1337,7 +1337,7 @@ ExecQueryUsingCursor(const char *query, double *elapsed_msec)
* If query requires multiple result sets, hack to ensure that
* only one pager instance is used for the whole mess
*/
- pset.queryFout = PageOutput(100000, my_popt.topt.pager);
+ pset.queryFout = PageOutput(100000, &(my_popt.topt));
did_pager = true;
}
diff --git a/src/bin/psql/help.c b/src/bin/psql/help.c
index ac0dc279078af910818e5062f904a39b49789ccd..2da444b6d594b41b0a050cfbf271af3822f0d9f7 100644
--- a/src/bin/psql/help.c
+++ b/src/bin/psql/help.c
@@ -65,7 +65,7 @@ usage(unsigned short int pager)
}
}
- output = PageOutput(59, pager);
+ output = PageOutput(59, pager ? &(pset.popt.topt) : NULL);
fprintf(output, _("psql is the PostgreSQL interactive terminal.\n\n"));
fprintf(output, _("Usage:\n"));
@@ -158,7 +158,7 @@ slashUsage(unsigned short int pager)
currdb = PQdb(pset.db);
- output = PageOutput(103, pager);
+ output = PageOutput(103, pager ? &(pset.popt.topt) : NULL);
/* if you add/remove a line here, change the row count above */
@@ -305,7 +305,7 @@ helpVariables(unsigned short int pager)
{
FILE *output;
- output = PageOutput(85, pager);
+ output = PageOutput(85, pager ? &(pset.popt.topt) : NULL);
fprintf(output, _("List of specially treated variables.\n"));
@@ -435,7 +435,7 @@ helpSQL(const char *topic, unsigned short int pager)
ncolumns = Max(ncolumns, 1);
nrows = (QL_HELP_COUNT + (ncolumns - 1)) / ncolumns;
- output = PageOutput(nrows + 1, pager);
+ output = PageOutput(nrows + 1, pager ? &(pset.popt.topt) : NULL);
fputs(_("Available help:\n"), output);
@@ -488,7 +488,7 @@ helpSQL(const char *topic, unsigned short int pager)
if (wordlen >= len) /* Don't try again if the same word */
{
if (!output)
- output = PageOutput(nl_count, pager);
+ output = PageOutput(nl_count, pager ? &(pset.popt.topt) : NULL);
break;
}
len = wordlen;
@@ -509,7 +509,7 @@ helpSQL(const char *topic, unsigned short int pager)
}
if (!output)
- output = PageOutput(nl_count, pager);
+ output = PageOutput(nl_count, pager ? &(pset.popt.topt) : NULL);
for (i = 0; QL_HELP[i].cmd; i++)
{
diff --git a/src/bin/psql/input.c b/src/bin/psql/input.c
index d52a3347970fd957910fb09de33b36d29fae2f75..437fa4d663ae6c5b61f967542402c5ff1cc7a0fa 100644
--- a/src/bin/psql/input.c
+++ b/src/bin/psql/input.c
@@ -474,7 +474,7 @@ printHistory(const char *fname, unsigned short int pager)
if (fname == NULL)
{
/* use pager, if enabled, when printing to console */
- output = PageOutput(INT_MAX, pager);
+ output = PageOutput(INT_MAX, pager ? &(pset.popt.topt) : NULL);
is_pager = true;
}
else
diff --git a/src/bin/psql/print.c b/src/bin/psql/print.c
index f6f931084132b91e72f41307b0a6300cae1dcfbc..9c12dbe049a58b311d79a452d5c0cc66e4110bdd 100644
--- a/src/bin/psql/print.c
+++ b/src/bin/psql/print.c
@@ -811,7 +811,7 @@ print_aligned_text(const printTableContent *cont, FILE *fout)
if (!is_pager && fout == stdout && output_columns > 0 &&
(output_columns < total_header_width || output_columns < width_total))
{
- fout = PageOutput(INT_MAX, cont->opt->pager); /* force pager */
+ fout = PageOutput(INT_MAX, cont->opt); /* force pager */
is_pager = true;
}
@@ -2497,15 +2497,19 @@ print_troff_ms_vertical(const printTableContent *cont, FILE *fout)
* PageOutput
*
* Tests if pager is needed and returns appropriate FILE pointer.
+ *
+ * If the topt argument is NULL no pager is used.
*/
FILE *
-PageOutput(int lines, unsigned short int pager)
+PageOutput(int lines, const printTableOpt *topt)
{
/* check whether we need / can / are supposed to use pager */
- if (pager && isatty(fileno(stdin)) && isatty(fileno(stdout)))
+ if (topt && topt->pager && isatty(fileno(stdin)) && isatty(fileno(stdout)))
{
const char *pagerprog;
FILE *pagerpipe;
+ unsigned short int pager = topt->pager;
+ int min_lines = topt->pager_min_lines;
#ifdef TIOCGWINSZ
int result;
@@ -2514,7 +2518,9 @@ PageOutput(int lines, unsigned short int pager)
result = ioctl(fileno(stdout), TIOCGWINSZ, &screen_size);
/* >= accounts for a one-line prompt */
- if (result == -1 || lines >= screen_size.ws_row || pager > 1)
+ if (result == -1
+ || (lines >= screen_size.ws_row && lines >= min_lines)
+ || pager > 1)
{
#endif
pagerprog = getenv("PAGER");
@@ -2814,7 +2820,7 @@ IsPagerNeeded(const printTableContent *cont, const int extra_lines, bool expande
lines++;
}
- *fout = PageOutput(lines + extra_lines, cont->opt->pager);
+ *fout = PageOutput(lines + extra_lines, cont->opt);
*is_pager = (*fout != stdout);
}
else
diff --git a/src/bin/psql/print.h b/src/bin/psql/print.h
index a1a89d01dbbf1311cda3d7d10c182f461f35bf1d..66cdaf32ae743c175b3bfda946ececc1b5975217 100644
--- a/src/bin/psql/print.h
+++ b/src/bin/psql/print.h
@@ -89,6 +89,8 @@ typedef struct printTableOpt
* 1=dividing lines, 2=full */
unsigned short int pager; /* use pager for output (if to stdout and
* stdout is a tty) 0=off 1=on 2=always */
+ int pager_min_lines;/* don't use pager unless there are at least
+ * this many lines */
bool tuples_only; /* don't output headers, row counts, etc. */
bool start_table; /* print start decoration, eg <table> */
bool stop_table; /* print stop decoration, eg </table> */
@@ -164,7 +166,7 @@ extern const printTextFormat pg_asciiformat_old;
extern const printTextFormat pg_utf8format;
-extern FILE *PageOutput(int lines, unsigned short int pager);
+extern FILE *PageOutput(int lines, const printTableOpt *topt);
extern void ClosePager(FILE *pagerpipe);
extern void html_escaped_print(const char *in, FILE *fout);
diff --git a/src/bin/psql/startup.c b/src/bin/psql/startup.c
index 7f09c141a90f5cdf4af137dd5fd02c511df86b80..d57901f778010d675cd79699579af7dca0074614 100644
--- a/src/bin/psql/startup.c
+++ b/src/bin/psql/startup.c
@@ -129,6 +129,7 @@ main(int argc, char *argv[])
pset.popt.topt.format = PRINT_ALIGNED;
pset.popt.topt.border = 1;
pset.popt.topt.pager = 1;
+ pset.popt.topt.pager_min_lines = 0;
pset.popt.topt.start_table = true;
pset.popt.topt.stop_table = true;
pset.popt.topt.default_footer = true;
diff --git a/src/test/regress/expected/psql.out b/src/test/regress/expected/psql.out
index e87b82b9910c4ce619f388293396d171ee289f90..a2a261595a6d0d70f05d4d7f1eef9d7ac32711a2 100644
--- a/src/test/regress/expected/psql.out
+++ b/src/test/regress/expected/psql.out
@@ -65,6 +65,7 @@ linestyle ascii
null ''
numericlocale off
pager 1
+pager_min_lines 0
recordsep '\n'
recordsep_zero off
tableattr