I wrote:
> "Daniel Verite" <[email protected]> writes:
>> To avoid the confusion between "2:4" and "2":"4" or 2:4,
>> and the ambiguity with a possibly existing "2:4" column,
>> maybe we should abandon this syntax and require the optional
>> scolH to be on its own at the end of the command.
> That would be OK with me; it's certainly less of a hack than what's
> there now. (I went back and forth about how much effort to put into
> dealing with the colon syntax; I think the version I have in my patch
> would be all right, but it's not perfect.)
Here's a patch along those lines. Any objections?
regards, tom lane
diff --git a/doc/src/sgml/ref/psql-ref.sgml b/doc/src/sgml/ref/psql-ref.sgml
index b2b2adc..9eeb1ca 100644
*** a/doc/src/sgml/ref/psql-ref.sgml
--- b/doc/src/sgml/ref/psql-ref.sgml
*************** testdb=>
*** 993,1001 ****
<varlistentry id="APP-PSQL-meta-commands-crosstabview">
<term><literal>\crosstabview [
<replaceable class="parameter">colV</replaceable>
! <replaceable class="parameter">colH</replaceable>[:<replaceable class="parameter">scolH</replaceable>]
! [<replaceable class="parameter">colD</replaceable>]
! ] </literal></term>
<listitem>
<para>
Executes the current query buffer (like <literal>\g</literal>) and
--- 993,1002 ----
<varlistentry id="APP-PSQL-meta-commands-crosstabview">
<term><literal>\crosstabview [
<replaceable class="parameter">colV</replaceable>
! [ <replaceable class="parameter">colH</replaceable>
! [ <replaceable class="parameter">colD</replaceable>
! [ <replaceable class="parameter">scolH</replaceable>
! ] ] ] ] </literal></term>
<listitem>
<para>
Executes the current query buffer (like <literal>\g</literal>) and
*************** testdb=>
*** 1004,1019 ****
The output column identified by <replaceable class="parameter">colV</>
becomes a vertical header and the output column identified by
<replaceable class="parameter">colH</replaceable>
! becomes a horizontal header, optionally sorted by ranking data obtained
! from column <replaceable class="parameter">scolH</replaceable>.
<replaceable class="parameter">colD</replaceable> identifies
the output column to display within the grid.
! If <replaceable class="parameter">colD</replaceable> is not
! specified and there are exactly three columns in the result set,
! the column that is neither
! <replaceable class="parameter">colV</replaceable> nor
! <replaceable class="parameter">colH</replaceable>
! is displayed; if there are more columns, an error is reported.
</para>
<para>
--- 1005,1015 ----
The output column identified by <replaceable class="parameter">colV</>
becomes a vertical header and the output column identified by
<replaceable class="parameter">colH</replaceable>
! becomes a horizontal header.
<replaceable class="parameter">colD</replaceable> identifies
the output column to display within the grid.
! <replaceable class="parameter">scolH</replaceable> identifies
! an optional sort column for the horizontal header.
</para>
<para>
*************** testdb=>
*** 1024,1029 ****
--- 1020,1031 ----
and <replaceable class="parameter">colH</replaceable> as column 2.
<replaceable class="parameter">colH</replaceable> must differ from
<replaceable class="parameter">colV</replaceable>.
+ If <replaceable class="parameter">colD</replaceable> is not
+ specified and there are exactly three columns in the result set,
+ the column that is neither
+ <replaceable class="parameter">colV</replaceable> nor
+ <replaceable class="parameter">colH</replaceable>
+ is displayed; if there are more columns, an error is reported.
</para>
<para>
diff --git a/src/bin/psql/command.c b/src/bin/psql/command.c
index 227d180..e1f5805 100644
*** a/src/bin/psql/command.c
--- b/src/bin/psql/command.c
*************** exec_command(const char *cmd,
*** 368,380 ****
/* \crosstabview -- execute a query and display results in crosstab */
else if (strcmp(cmd, "crosstabview") == 0)
{
! pset.ctv_col_V = psql_scan_slash_option(scan_state,
! OT_NORMAL, NULL, false);
! pset.ctv_col_H = psql_scan_slash_option(scan_state,
! OT_NORMAL, NULL, false);
! pset.ctv_col_D = psql_scan_slash_option(scan_state,
! OT_NORMAL, NULL, false);
pset.crosstab_flag = true;
status = PSQL_CMD_SEND;
}
--- 368,378 ----
/* \crosstabview -- execute a query and display results in crosstab */
else if (strcmp(cmd, "crosstabview") == 0)
{
! int i;
+ for (i = 0; i < lengthof(pset.ctv_args); i++)
+ pset.ctv_args[i] = psql_scan_slash_option(scan_state,
+ OT_SQLID, NULL, true);
pset.crosstab_flag = true;
status = PSQL_CMD_SEND;
}
diff --git a/src/bin/psql/common.c b/src/bin/psql/common.c
index 437cb56..2c0d781 100644
*** a/src/bin/psql/common.c
--- b/src/bin/psql/common.c
*************** SendQuery(const char *query)
*** 1130,1135 ****
--- 1130,1136 ----
PGTransactionStatusType transaction_status;
double elapsed_msec = 0;
bool OK = false;
+ int i;
bool on_error_rollback_savepoint = false;
static bool on_error_rollback_warning = false;
*************** sendquery_cleanup:
*** 1362,1381 ****
/* reset \crosstabview trigger */
pset.crosstab_flag = false;
! if (pset.ctv_col_V)
! {
! free(pset.ctv_col_V);
! pset.ctv_col_V = NULL;
! }
! if (pset.ctv_col_H)
! {
! free(pset.ctv_col_H);
! pset.ctv_col_H = NULL;
! }
! if (pset.ctv_col_D)
{
! free(pset.ctv_col_D);
! pset.ctv_col_D = NULL;
}
return OK;
--- 1363,1372 ----
/* reset \crosstabview trigger */
pset.crosstab_flag = false;
! for (i = 0; i < lengthof(pset.ctv_args); i++)
{
! pg_free(pset.ctv_args[i]);
! pset.ctv_args[i] = NULL;
}
return OK;
diff --git a/src/bin/psql/crosstabview.c b/src/bin/psql/crosstabview.c
index 3cc15ed..56cae7a 100644
*** a/src/bin/psql/crosstabview.c
--- b/src/bin/psql/crosstabview.c
*************** static bool printCrosstab(const PGresult
*** 82,90 ****
int num_columns, pivot_field *piv_columns, int field_for_columns,
int num_rows, pivot_field *piv_rows, int field_for_rows,
int field_for_data);
- static int parseColumnRefs(const char *arg, const PGresult *res,
- int **col_numbers,
- int max_columns, char separator);
static void avlInit(avl_tree *tree);
static void avlMergeValue(avl_tree *tree, char *name, char *sort_value);
static int avlCollectFields(avl_tree *tree, avl_node *node,
--- 82,87 ----
*************** static int rankCompare(const void *a, co
*** 99,231 ****
/*
* Main entry point to this module.
*
! * Process the data from *res according the display options in pset (global),
* to generate the horizontal and vertical headers contents,
* then call printCrosstab() for the actual output.
*/
bool
PrintResultsInCrosstab(const PGresult *res)
{
! char *opt_field_for_rows = pset.ctv_col_V;
! char *opt_field_for_columns = pset.ctv_col_H;
! char *opt_field_for_data = pset.ctv_col_D;
! int rn;
avl_tree piv_columns;
avl_tree piv_rows;
pivot_field *array_columns = NULL;
pivot_field *array_rows = NULL;
int num_columns = 0;
int num_rows = 0;
- int *colsV = NULL,
- *colsH = NULL,
- *colsD = NULL;
- int n;
- int field_for_columns;
- int sort_field_for_columns = -1;
int field_for_rows;
! int field_for_data = -1;
! bool retval = false;
avlInit(&piv_rows);
avlInit(&piv_columns);
- if (res == NULL)
- {
- psql_error(_("No result\n"));
- goto error_return;
- }
-
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
! psql_error(_("The query must return results to be shown in crosstab\n"));
! goto error_return;
! }
!
! if (opt_field_for_rows && !opt_field_for_columns)
! {
! psql_error(_("A second column must be specified for the horizontal header\n"));
goto error_return;
}
! if (PQnfields(res) <= 2)
{
! psql_error(_("The query must return at least two columns to be shown in crosstab\n"));
goto error_return;
}
! /*
! * Arguments processing for the vertical header (1st arg) displayed in the
! * left-most column. Only a reference to a field is accepted (no sort
! * column).
! */
!
! if (opt_field_for_rows == NULL)
! {
field_for_rows = 0;
- }
else
{
! n = parseColumnRefs(opt_field_for_rows, res, &colsV, 1, ':');
! if (n != 1)
goto error_return;
- field_for_rows = colsV[0];
}
! if (field_for_rows < 0)
! goto error_return;
!
! /*----------
! * Arguments processing for the horizontal header (2nd arg)
! * (pivoted column that gets displayed as the first row).
! * Determine:
! * - the field number for the horizontal header column
! * - the field number of the associated sort column, if any
! */
!
! if (opt_field_for_columns == NULL)
field_for_columns = 1;
else
{
! n = parseColumnRefs(opt_field_for_columns, res, &colsH, 2, ':');
! if (n <= 0)
! goto error_return;
! if (n == 1)
! field_for_columns = colsH[0];
! else
! {
! field_for_columns = colsH[0];
! sort_field_for_columns = colsH[1];
! }
!
if (field_for_columns < 0)
goto error_return;
}
if (field_for_columns == field_for_rows)
{
! psql_error(_("The same column cannot be used for both vertical and horizontal headers\n"));
goto error_return;
}
! /*
! * Arguments processing for the data columns (3rd arg). Determine the
! * column to display in the grid.
! */
! if (opt_field_for_data == NULL)
{
! int i;
/*
* If the data column was not specified, we search for the one not
! * used as either vertical or horizontal headers. If the result has
! * more than three columns, raise an error.
*/
! if (PQnfields(res) > 3)
{
! psql_error(_("Data column must be specified when the result set has more than three columns\n"));
goto error_return;
}
for (i = 0; i < PQnfields(res); i++)
{
if (i != field_for_rows && i != field_for_columns)
--- 96,180 ----
/*
* Main entry point to this module.
*
! * Process the data from *res according to the options in pset (global),
* to generate the horizontal and vertical headers contents,
* then call printCrosstab() for the actual output.
*/
bool
PrintResultsInCrosstab(const PGresult *res)
{
! bool retval = false;
avl_tree piv_columns;
avl_tree piv_rows;
pivot_field *array_columns = NULL;
pivot_field *array_rows = NULL;
int num_columns = 0;
int num_rows = 0;
int field_for_rows;
! int field_for_columns;
! int field_for_data;
! int sort_field_for_columns;
! int rn;
avlInit(&piv_rows);
avlInit(&piv_columns);
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
! psql_error(_("\\crosstabview: query must return results to be shown in crosstab\n"));
goto error_return;
}
! if (PQnfields(res) < 3)
{
! psql_error(_("\\crosstabview: query must return at least three columns\n"));
goto error_return;
}
! /* Process first optional arg (vertical header column) */
! if (pset.ctv_args[0] == NULL)
field_for_rows = 0;
else
{
! field_for_rows = indexOfColumn(pset.ctv_args[0], res);
! if (field_for_rows < 0)
goto error_return;
}
! /* Process second optional arg (horizontal header column) */
! if (pset.ctv_args[1] == NULL)
field_for_columns = 1;
else
{
! field_for_columns = indexOfColumn(pset.ctv_args[1], res);
if (field_for_columns < 0)
goto error_return;
}
+ /* Insist that header columns be distinct */
if (field_for_columns == field_for_rows)
{
! psql_error(_("\\crosstabview: vertical and horizontal headers must be different columns\n"));
goto error_return;
}
! /* Process third optional arg (data column) */
! if (pset.ctv_args[2] == NULL)
{
! int i;
/*
* If the data column was not specified, we search for the one not
! * used as either vertical or horizontal headers. Must be exactly
! * three columns, or this won't be unique.
*/
! if (PQnfields(res) != 3)
{
! psql_error(_("\\crosstabview: data column must be specified when query returns more than three columns\n"));
goto error_return;
}
+ field_for_data = -1;
for (i = 0; i < PQnfields(res); i++)
{
if (i != field_for_rows && i != field_for_columns)
*************** PrintResultsInCrosstab(const PGresult *r
*** 238,250 ****
}
else
{
! int num_fields;
! /* If a field was given, find out what it is. Only one is allowed. */
! num_fields = parseColumnRefs(opt_field_for_data, res, &colsD, 1, ',');
! if (num_fields < 1)
goto error_return;
- field_for_data = colsD[0];
}
/*
--- 187,205 ----
}
else
{
! field_for_data = indexOfColumn(pset.ctv_args[2], res);
! if (field_for_data < 0)
! goto error_return;
! }
! /* Process fourth optional arg (horizontal header sort column) */
! if (pset.ctv_args[3] == NULL)
! sort_field_for_columns = -1; /* no sort column */
! else
! {
! sort_field_for_columns = indexOfColumn(pset.ctv_args[3], res);
! if (sort_field_for_columns < 0)
goto error_return;
}
/*
*************** PrintResultsInCrosstab(const PGresult *r
*** 271,277 ****
if (piv_columns.count > CROSSTABVIEW_MAX_COLUMNS)
{
! psql_error(_("Maximum number of columns (%d) exceeded\n"),
CROSSTABVIEW_MAX_COLUMNS);
goto error_return;
}
--- 226,232 ----
if (piv_columns.count > CROSSTABVIEW_MAX_COLUMNS)
{
! psql_error(_("\\crosstabview: maximum number of columns (%d) exceeded\n"),
CROSSTABVIEW_MAX_COLUMNS);
goto error_return;
}
*************** error_return:
*** 319,327 ****
avlFree(&piv_rows, piv_rows.root);
pg_free(array_columns);
pg_free(array_rows);
- pg_free(colsV);
- pg_free(colsH);
- pg_free(colsD);
return retval;
}
--- 274,279 ----
*************** printCrosstab(const PGresult *results,
*** 442,448 ****
*/
if (cont.cells[idx] != NULL)
{
! psql_error(_("data cell already contains a value: (row: \"%s\", column: \"%s\")\n"),
piv_rows[row_number].name ? piv_rows[row_number].name :
popt.nullPrint ? popt.nullPrint : "(null)",
piv_columns[col_number].name ? piv_columns[col_number].name :
--- 394,400 ----
*/
if (cont.cells[idx] != NULL)
{
! psql_error(_("\\crosstabview: query result contains multiple data values for row \"%s\", column \"%s\"\n"),
piv_rows[row_number].name ? piv_rows[row_number].name :
popt.nullPrint ? popt.nullPrint : "(null)",
piv_columns[col_number].name ? piv_columns[col_number].name :
*************** error:
*** 476,583 ****
}
/*
- * Parse "arg", which is a string of column IDs separated by "separator".
- *
- * Each column ID can be:
- * - a number from 1 to PQnfields(res)
- * - an unquoted column name matching (case insensitively) one of PQfname(res,...)
- * - a quoted column name matching (case sensitively) one of PQfname(res,...)
- *
- * If max_columns > 0, it is the max number of column IDs allowed.
- *
- * On success, return number of column IDs found (possibly 0), and return a
- * malloc'd array of the matching column numbers of "res" into *col_numbers.
- *
- * On failure, return -1 and set *col_numbers to NULL.
- */
- static int
- parseColumnRefs(const char *arg,
- const PGresult *res,
- int **col_numbers,
- int max_columns,
- char separator)
- {
- const char *p = arg;
- char c;
- int num_cols = 0;
-
- *col_numbers = NULL;
- while ((c = *p) != '\0')
- {
- const char *field_start = p;
- bool quoted_field = false;
-
- /* first char */
- if (c == '"')
- {
- quoted_field = true;
- p++;
- }
-
- while ((c = *p) != '\0')
- {
- if (c == separator && !quoted_field)
- break;
- if (c == '"') /* end of field or embedded double quote */
- {
- p++;
- if (*p == '"')
- {
- if (quoted_field)
- {
- p++;
- continue;
- }
- }
- else if (quoted_field && *p == separator)
- break;
- }
- if (*p)
- p += PQmblen(p, pset.encoding);
- }
-
- if (p != field_start)
- {
- char *col_name;
- int col_num;
-
- /* enforce max_columns limit */
- if (max_columns > 0 && num_cols == max_columns)
- {
- psql_error(_("No more than %d column references expected\n"),
- max_columns);
- goto errfail;
- }
- /* look up the column and add its index into *col_numbers */
- col_name = pg_malloc(p - field_start + 1);
- memcpy(col_name, field_start, p - field_start);
- col_name[p - field_start] = '\0';
- col_num = indexOfColumn(col_name, res);
- pg_free(col_name);
- if (col_num < 0)
- goto errfail;
- *col_numbers = (int *) pg_realloc(*col_numbers,
- (num_cols + 1) * sizeof(int));
- (*col_numbers)[num_cols++] = col_num;
- }
- else
- {
- psql_error(_("Empty column reference\n"));
- goto errfail;
- }
-
- if (*p)
- p += PQmblen(p, pset.encoding);
- }
- return num_cols;
-
- errfail:
- pg_free(*col_numbers);
- *col_numbers = NULL;
- return -1;
- }
-
- /*
* The avl* functions below provide a minimalistic implementation of AVL binary
* trees, to efficiently collect the distinct values that will form the horizontal
* and vertical headers. It only supports adding new values, no removal or even
--- 428,433 ----
*************** rankSort(int num_columns, pivot_field *p
*** 773,833 ****
}
/*
! * Compare a user-supplied argument against a field name obtained by PQfname(),
! * which is already case-folded.
! * If arg is not enclosed in double quotes, pg_strcasecmp applies, otherwise
! * do a case-sensitive comparison with these rules:
! * - double quotes enclosing 'arg' are filtered out
! * - double quotes inside 'arg' are expected to be doubled
! */
! static bool
! fieldNameEquals(const char *arg, const char *fieldname)
! {
! const char *p = arg;
! const char *f = fieldname;
! char c;
!
! if (*p++ != '"')
! return (pg_strcasecmp(arg, fieldname) == 0);
!
! while ((c = *p++))
! {
! if (c == '"')
! {
! if (*p == '"')
! p++; /* skip second quote and continue */
! else if (*p == '\0')
! return (*f == '\0'); /* p is shorter than f, or is
! * identical */
! }
! if (*f == '\0')
! return false; /* f is shorter than p */
! if (c != *f) /* found one byte that differs */
! return false;
! f++;
! }
! return (*f == '\0');
! }
!
! /*
! * arg can be a number or a column name, possibly quoted (like in an ORDER BY clause)
! * Returns:
! * on success, the 0-based index of the column
! * or -1 if the column number or name is not found in the result's structure,
! * or if it's ambiguous (arg corresponding to several columns)
*/
static int
indexOfColumn(const char *arg, const PGresult *res)
{
int idx;
! if (strspn(arg, "0123456789") == strlen(arg))
{
/* if arg contains only digits, it's a column number */
idx = atoi(arg) - 1;
if (idx < 0 || idx >= PQnfields(res))
{
! psql_error(_("Invalid column number: %s\n"), arg);
return -1;
}
}
--- 623,646 ----
}
/*
! * Look up a column reference, which can be either:
! * - a number from 1 to PQnfields(res)
! * - a column name matching one of PQfname(res,...)
! *
! * Returns zero-based column number, or -1 if not found or ambiguous.
*/
static int
indexOfColumn(const char *arg, const PGresult *res)
{
int idx;
! if (arg[0] && strspn(arg, "0123456789") == strlen(arg))
{
/* if arg contains only digits, it's a column number */
idx = atoi(arg) - 1;
if (idx < 0 || idx >= PQnfields(res))
{
! psql_error(_("\\crosstabview: invalid column number: \"%s\"\n"), arg);
return -1;
}
}
*************** indexOfColumn(const char *arg, const PGr
*** 838,849 ****
idx = -1;
for (i = 0; i < PQnfields(res); i++)
{
! if (fieldNameEquals(arg, PQfname(res, i)))
{
if (idx >= 0)
{
! /* if another idx was already found for the same name */
! psql_error(_("Ambiguous column name: %s\n"), arg);
return -1;
}
idx = i;
--- 651,662 ----
idx = -1;
for (i = 0; i < PQnfields(res); i++)
{
! if (strcmp(arg, PQfname(res, i)) == 0)
{
if (idx >= 0)
{
! /* another idx was already found for the same name */
! psql_error(_("\\crosstabview: ambiguous column name: \"%s\"\n"), arg);
return -1;
}
idx = i;
*************** indexOfColumn(const char *arg, const PGr
*** 851,857 ****
}
if (idx == -1)
{
! psql_error(_("Invalid column name: %s\n"), arg);
return -1;
}
}
--- 664,670 ----
}
if (idx == -1)
{
! psql_error(_("\\crosstabview: column name not found: \"%s\"\n"), arg);
return -1;
}
}
diff --git a/src/bin/psql/settings.h b/src/bin/psql/settings.h
index 643ff8c..8cfe9d2 100644
*** a/src/bin/psql/settings.h
--- b/src/bin/psql/settings.h
*************** typedef struct _psqlSettings
*** 94,102 ****
char *gset_prefix; /* one-shot prefix argument for \gset */
bool gexec_flag; /* one-shot flag to execute query's results */
bool crosstab_flag; /* one-shot request to crosstab results */
! char *ctv_col_V; /* \crosstabview 1st argument */
! char *ctv_col_H; /* \crosstabview 2nd argument */
! char *ctv_col_D; /* \crosstabview 3nd argument */
bool notty; /* stdin or stdout is not a tty (as determined
* on startup) */
--- 94,100 ----
char *gset_prefix; /* one-shot prefix argument for \gset */
bool gexec_flag; /* one-shot flag to execute query's results */
bool crosstab_flag; /* one-shot request to crosstab results */
! char *ctv_args[4]; /* \crosstabview arguments */
bool notty; /* stdin or stdout is not a tty (as determined
* on startup) */
diff --git a/src/test/regress/expected/psql_crosstab.out b/src/test/regress/expected/psql_crosstab.out
index c87c2fc..c508f87 100644
*** a/src/test/regress/expected/psql_crosstab.out
--- b/src/test/regress/expected/psql_crosstab.out
*************** SELECT v, EXTRACT(year FROM d), count(*)
*** 35,41 ****
-- ordered months in horizontal header, quoted column name
SELECT v, to_char(d, 'Mon') AS "month name", EXTRACT(month FROM d) AS num,
count(*) FROM ctv_data GROUP BY 1,2,3 ORDER BY 1
! \crosstabview v "month name":num 4
v | Jan | Apr | Jul | Dec
----+-----+-----+-----+-----
v0 | | | 2 | 1
--- 35,41 ----
-- ordered months in horizontal header, quoted column name
SELECT v, to_char(d, 'Mon') AS "month name", EXTRACT(month FROM d) AS num,
count(*) FROM ctv_data GROUP BY 1,2,3 ORDER BY 1
! \crosstabview v "month name" 4 num
v | Jan | Apr | Jul | Dec
----+-----+-----+-----+-----
v0 | | | 2 | 1
*************** SELECT EXTRACT(year FROM d) AS year, to_
*** 50,56 ****
FROM ctv_data
GROUP BY EXTRACT(year FROM d), to_char(d,'Mon'), EXTRACT(month FROM d)
ORDER BY month
! \crosstabview "month name" year:year format
month name | 2014 | 2015
------------+-----------------+----------------
Jan | | sum=3 avg=3.0
--- 50,56 ----
FROM ctv_data
GROUP BY EXTRACT(year FROM d), to_char(d,'Mon'), EXTRACT(month FROM d)
ORDER BY month
! \crosstabview "month name" year format year
month name | 2014 | 2015
------------+-----------------+----------------
Jan | | sum=3 avg=3.0
*************** SELECT v, h, string_agg(c, E'\n') FROM c
*** 74,80 ****
-- horizontal ASC order from window function
SELECT v,h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h:r c
v | h0 | h1 | h2 | h4 |
----+-----+-----+------+-----+-----
v0 | | | | qux+| qux
--- 74,80 ----
-- horizontal ASC order from window function
SELECT v,h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h c r
v | h0 | h1 | h2 | h4 |
----+-----+-----+------+-----+-----
v0 | | | | qux+| qux
*************** FROM ctv_data GROUP BY v, h ORDER BY 1,3
*** 87,93 ****
-- horizontal DESC order from window function
SELECT v, h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h DESC) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h:r c
v | | h4 | h2 | h1 | h0
----+-----+-----+------+-----+-----
v0 | qux | qux+| | |
--- 87,93 ----
-- horizontal DESC order from window function
SELECT v, h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h DESC) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h c r
v | | h4 | h2 | h1 | h0
----+-----+-----+------+-----+-----
v0 | qux | qux+| | |
*************** FROM ctv_data GROUP BY v, h ORDER BY 1,3
*** 100,106 ****
-- horizontal ASC order from window function, NULLs pushed rightmost
SELECT v,h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h NULLS LAST) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h:r c
v | h0 | h1 | h2 | h4 |
----+-----+-----+------+-----+-----
v0 | | | | qux+| qux
--- 100,106 ----
-- horizontal ASC order from window function, NULLs pushed rightmost
SELECT v,h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h NULLS LAST) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h c r
v | h0 | h1 | h2 | h4 |
----+-----+-----+------+-----+-----
v0 | | | | qux+| qux
*************** FROM ctv_data GROUP BY v, h ORDER BY 1,3
*** 112,118 ****
-- only null, no column name, 2 columns: error
SELECT null,null \crosstabview
! The query must return at least two columns to be shown in crosstab
-- only null, no column name, 3 columns: works
SELECT null,null,null \crosstabview
?column? |
--- 112,118 ----
-- only null, no column name, 2 columns: error
SELECT null,null \crosstabview
! \crosstabview: query must return at least three columns
-- only null, no column name, 3 columns: works
SELECT null,null,null \crosstabview
?column? |
*************** FROM ctv_data GROUP BY v, h ORDER BY h,v
*** 166,185 ****
-- error: bad column name
SELECT v,h,c,i FROM ctv_data
\crosstabview v h j
! Invalid column name: j
-- error: bad column number
SELECT v,h,i,c FROM ctv_data
\crosstabview 2 1 5
! Invalid column number: 5
-- error: same H and V columns
SELECT v,h,i,c FROM ctv_data
\crosstabview 2 h 4
! The same column cannot be used for both vertical and horizontal headers
-- error: too many columns
SELECT a,a,1 FROM generate_series(1,3000) AS a
\crosstabview
! Maximum number of columns (1600) exceeded
-- error: only one column
SELECT 1 \crosstabview
! The query must return at least two columns to be shown in crosstab
DROP TABLE ctv_data;
--- 166,185 ----
-- error: bad column name
SELECT v,h,c,i FROM ctv_data
\crosstabview v h j
! \crosstabview: column name not found: "j"
-- error: bad column number
SELECT v,h,i,c FROM ctv_data
\crosstabview 2 1 5
! \crosstabview: invalid column number: "5"
-- error: same H and V columns
SELECT v,h,i,c FROM ctv_data
\crosstabview 2 h 4
! \crosstabview: vertical and horizontal headers must be different columns
-- error: too many columns
SELECT a,a,1 FROM generate_series(1,3000) AS a
\crosstabview
! \crosstabview: maximum number of columns (1600) exceeded
-- error: only one column
SELECT 1 \crosstabview
! \crosstabview: query must return at least three columns
DROP TABLE ctv_data;
diff --git a/src/test/regress/sql/psql_crosstab.sql b/src/test/regress/sql/psql_crosstab.sql
index e602676..d47555f 100644
*** a/src/test/regress/sql/psql_crosstab.sql
--- b/src/test/regress/sql/psql_crosstab.sql
*************** SELECT v, EXTRACT(year FROM d), count(*)
*** 23,29 ****
-- ordered months in horizontal header, quoted column name
SELECT v, to_char(d, 'Mon') AS "month name", EXTRACT(month FROM d) AS num,
count(*) FROM ctv_data GROUP BY 1,2,3 ORDER BY 1
! \crosstabview v "month name":num 4
-- ordered months in vertical header, ordered years in horizontal header
SELECT EXTRACT(year FROM d) AS year, to_char(d,'Mon') AS "month name",
--- 23,29 ----
-- ordered months in horizontal header, quoted column name
SELECT v, to_char(d, 'Mon') AS "month name", EXTRACT(month FROM d) AS num,
count(*) FROM ctv_data GROUP BY 1,2,3 ORDER BY 1
! \crosstabview v "month name" 4 num
-- ordered months in vertical header, ordered years in horizontal header
SELECT EXTRACT(year FROM d) AS year, to_char(d,'Mon') AS "month name",
*************** SELECT EXTRACT(year FROM d) AS year, to_
*** 32,38 ****
FROM ctv_data
GROUP BY EXTRACT(year FROM d), to_char(d,'Mon'), EXTRACT(month FROM d)
ORDER BY month
! \crosstabview "month name" year:year format
-- combine contents vertically into the same cell (V/H duplicates)
SELECT v, h, string_agg(c, E'\n') FROM ctv_data GROUP BY v, h ORDER BY 1,2,3
--- 32,38 ----
FROM ctv_data
GROUP BY EXTRACT(year FROM d), to_char(d,'Mon'), EXTRACT(month FROM d)
ORDER BY month
! \crosstabview "month name" year format year
-- combine contents vertically into the same cell (V/H duplicates)
SELECT v, h, string_agg(c, E'\n') FROM ctv_data GROUP BY v, h ORDER BY 1,2,3
*************** SELECT v, h, string_agg(c, E'\n') FROM c
*** 41,57 ****
-- horizontal ASC order from window function
SELECT v,h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h:r c
-- horizontal DESC order from window function
SELECT v, h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h DESC) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h:r c
-- horizontal ASC order from window function, NULLs pushed rightmost
SELECT v,h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h NULLS LAST) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h:r c
-- only null, no column name, 2 columns: error
SELECT null,null \crosstabview
--- 41,57 ----
-- horizontal ASC order from window function
SELECT v,h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h c r
-- horizontal DESC order from window function
SELECT v, h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h DESC) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h c r
-- horizontal ASC order from window function, NULLs pushed rightmost
SELECT v,h, string_agg(c, E'\n') AS c, row_number() OVER(ORDER BY h NULLS LAST) AS r
FROM ctv_data GROUP BY v, h ORDER BY 1,3,2
! \crosstabview v h c r
-- only null, no column name, 2 columns: error
SELECT null,null \crosstabview
--
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