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QGIS/resources/function_help/json
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nirvn 617955ac1e [expression] Language support for format_date() and to_{date,datetime,time}() 
By default, those expression use the application's locale. The addition of an optional
language parameter allows handling of dates that wouldn't match that default
locale (say for e.g. an English system running QGIS trying to transform a
French-formatted string into a date object).
2019-11-18 12:13:47 +07:00
..
$area
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
$atlasfeature
…
$atlasfeatureid
…
$atlasgeometry
…
$currentfeature
…
$feature
…
$geometry
…
$id
…
$length
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
$map
…
$numfeatures
…
$numpages
…
$page
…
$perimeter
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
$rownum
…
$scale
Precise that scale function returns the denominator and not the scale itself
2016-05-18 10:43:19 +02:00
$x
…
$x_at
Expression calculator: clarify documentation for x_at() and y_at()
2018-11-29 23:26:43 +13:00
$y
…
$y_at
Expression calculator: clarify documentation for x_at() and y_at()
2018-11-29 23:26:43 +13:00
abs
…
acos
…
age
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
aggregate
Add "concatenate_unique" and "array_agg" as aggregate parameter
2019-10-03 13:28:36 +10:00
Aggregates
Add missing function help (fix #15264)
2016-07-19 12:12:32 +10:00
AND
…
angle_at_vertex
[expression] Negative index support to point_n(), angle_at_vertex(), distance_to_vertex() functions
2019-03-13 11:20:04 +07:00
area
More descriptive function help for area/length/perimeter functions
2016-02-23 11:48:10 +11:00
array
Update map and array examples
2018-08-24 14:04:27 +02:00
array_agg
[FEATURE] Add order by support to expression aggregate and concatenation functions
2019-05-10 06:23:56 +10:00
array_all
Fix typo
2019-08-26 08:45:54 +10:00
array_append
Update map and array examples
2018-08-24 14:04:27 +02:00
array_cat
Update map and array examples
2018-08-24 14:04:27 +02:00
array_contains
Add expression functions for arrays and maps
2016-09-20 13:22:55 +02:00
array_distinct
Update map and array examples
2018-08-24 14:04:27 +02:00
array_filter
Fix example display
2018-08-27 21:35:39 +10:00
array_find
Add expression functions for arrays and maps
2016-09-20 13:22:55 +02:00
array_first
array docs
2017-07-07 13:01:17 +02:00
array_foreach
Update map and array examples
2018-08-24 14:04:27 +02:00
array_get
Add expression functions for arrays and maps
2016-09-20 13:22:55 +02:00
array_insert
Update map and array examples
2018-08-24 14:04:27 +02:00
array_intersect
corrections
2018-05-14 15:13:22 +02:00
array_last
array docs
2017-07-07 13:01:17 +02:00
array_length
Add expression functions for arrays and maps
2016-09-20 13:22:55 +02:00
array_prepend
Update map and array examples
2018-08-24 14:04:27 +02:00
array_remove_all
Update map and array examples
2018-08-24 14:04:27 +02:00
array_remove_at
Update map and array examples
2018-08-24 14:04:27 +02:00
array_reverse
Update map and array examples
2018-08-24 14:04:27 +02:00
array_slice
Update map and array examples
2018-08-24 14:04:27 +02:00
array_sort
[FEATURE][expression] Brand new array_sort() function
2018-12-20 11:47:16 +07:00
array_to_string
Fix array_to_string description and add default value example
2018-08-24 11:54:34 +02:00
Arrays
Added new help files to the expression function groups of Arrays and Maps
2017-08-04 20:30:37 +02:00
asin
…
atan
…
atan2
…
attribute
[FEATURE][expressions] Simplified variant of "attribute" function
2019-02-23 05:20:52 +10:00
attributes
[FEATURE] New expression function "attributes"
2019-06-28 13:14:17 +10:00
azimuth
[FEATURE] Allow expression functions to use named parameters
2016-04-04 13:59:13 +10:00
base_file_name
[FEATURE] Expression functions which return file info
2019-04-27 17:24:37 +10:00
boundary
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
bounds
…
bounds_height
…
bounds_width
…
buffer
add optional segments argument
2018-05-10 16:58:12 +02:00
buffer_by_m
[FEATURE] Add expression functions for tapered and variable
2018-05-01 06:16:01 +10:00
CASE
replace three dots with ellipsises in translation strings
2018-10-27 19:06:37 +02:00
ceil
…
centroid
…
char
Add missing function help (fix #15264)
2016-07-19 12:12:32 +10:00
clamp
…
closest_point
expression help: support optional parameters and defaults
2018-05-10 20:15:39 +02:00
coalesce
[spellcheck] properly look into various cases and add more fixes"
2017-01-16 16:39:20 +01:00
collect
[FEATURE] support aggregation of geometry
2016-08-24 08:39:05 +07:00
collect_geometries
spelling fixes (closes #32408)
2019-10-26 10:50:30 +10:00
Color
…
color_cmyk
…
color_cmyka
…
color_grayscale_average
[FEATURE] color_grayscale_average() and color_mix_rgb() expression functions (#6554)
2018-03-07 11:59:52 +07:00
color_hsl
…
color_hsla
…
color_hsv
…
color_hsva
…
color_mix_rgb
fix translation strings
2018-03-09 21:47:49 +01:00
color_part
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
color_rgb
…
color_rgba
…
combine
…
concat
…
concatenate
[FEATURE] Add order by support to expression aggregate and concatenation functions
2019-05-10 06:23:56 +10:00
concatenate_unique
[FEATURE] Add order by support to expression aggregate and concatenation functions
2019-05-10 06:23:56 +10:00
Conditionals
…
Conditions
…
contains
first example deleted, cause it is for combine function
2018-11-30 07:39:57 +10:00
Conversions
…
convex_hull
first example deleted, cause it is for combine function
2018-11-30 07:39:57 +10:00
cos
…
count
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
count_distinct
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
count_missing
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
create_ramp
[FEATURE] create_ramp() expression function
2017-05-29 16:31:53 +07:00
crosses
…
current_value
Updated docs for current_value function
2018-05-15 12:45:43 +02:00
Custom
…
darker
[FEATURE] add darker() and lighter() expression functions
2015-12-09 15:50:59 +11:00
Date and Time
…
day
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
day_of_week
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
decode_uri
Double escape for JSON and C++
2018-12-18 17:04:50 +01:00
degrees
[Expression] radians and degrees
2015-12-10 00:41:42 +01:00
difference
…
disjoint
…
distance
…
distance_to_vertex
[expression] Negative index support to point_n(), angle_at_vertex(), distance_to_vertex() functions
2019-03-13 11:20:04 +07:00
end_point
…
env
translation string fixes
2017-03-05 11:37:57 +01:00
epoch
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
eval
replace three dots with ellipsises in translation strings
2018-10-27 19:06:37 +02:00
exp
…
extend
[FEATURE] New expression function 'extend'
2016-10-31 07:56:24 +10:00
exterior_ring
[FEATURE] exterior_ring function for expressions
2015-12-13 20:11:19 +11:00
extrude
Add extrude function to QgsGeometry
2016-01-14 12:28:31 +01:00
Field
Replace "double click" and "doubleclick" by double-click
2017-07-07 01:26:38 +02:00
Fields and Values
fix linebreaks in function help and CASE (fixes #14189)
2016-02-26 00:27:48 +01:00
file_exists
[FEATURE] Expression functions which return file info
2019-04-27 17:24:37 +10:00
file_name
Fix expression function examples
2019-04-28 15:47:35 +10:00
file_path
Fix expression function examples
2019-04-28 15:47:35 +10:00
file_size
[FEATURE] Expression functions which return file info
2019-04-27 17:24:37 +10:00
file_suffix
Fix expression function examples
2019-04-28 15:47:35 +10:00
Files and Paths
Add missing function group help
2019-05-22 03:45:00 +10:00
flip_coordinates
Add missing expression help
2018-04-05 06:35:13 +10:00
floor
…
force_rhr
[FEATURE] force_rhr expression function
2018-11-09 19:06:48 +10:00
format
…
format_date
[expression] Language support for format_date() and to_{date,datetime,time}()
2019-11-18 12:13:47 +07:00
format_number
…
from_json
Rename json functions to postgres names
2019-01-18 17:45:12 +07:00
Fuzzy Matching
…
General
…
generate_series
Merge branch 'master' into patch-2
2018-08-24 16:05:15 +02:00
geom_from_gml
…
geom_from_wkb
[FEATURE] Add expression functions for converting to/from wkb
2019-11-04 13:00:11 +10:00
geom_from_wkt
…
geom_to_wkb
[FEATURE] Add expression functions for converting to/from wkb
2019-11-04 13:00:11 +10:00
geom_to_wkt
…
geometry
…
geometry_n
[FEATURE] More geometry functions for expressions
2015-12-15 11:22:39 +11:00
GeometryGroup
…
get_feature
…
get_feature_by_id
get_feature_by_id docs
2017-07-07 13:01:17 +02:00
hamming_distance
…
hash
rewrite functions. Only hash(string, method), md5(string) and sha256(string) are available now
2019-10-26 08:32:26 +10:00
hausdorff_distance
Typo corrected
2017-09-05 15:28:40 +02:00
hour
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
hstore_to_map
[FEATURE] hstore_to_map() / map_to_hstore() expression functions
2018-09-14 11:21:40 +07:00
if
Fix expression "if" documentation
2016-03-31 13:13:32 +02:00
ILIKE
[BUGFIX] Expression in like escape % and _
2016-09-30 14:27:53 +02:00
IN
…
inclination
add missing help for inclination
2017-08-01 21:48:03 +02:00
interior_ring_n
[FEATURE] More geometry functions for expressions
2015-12-15 11:22:39 +11:00
intersection
…
intersects
…
intersects_bbox
…
iqr
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
IS
…
IS NOT
…
is_closed
[FEATURE] is_closed function for expressions
2015-12-13 22:06:22 +11:00
is_directory
[FEATURE] Expression functions which return file info
2019-04-27 17:24:37 +10:00
is_file
[FEATURE] Expression functions which return file info
2019-04-27 17:24:37 +10:00
is_layer_visible
[FEATURE] expression engine's is_layer_visible() (#4045)
2017-01-25 11:47:26 +07:00
is_selected
Improve num_selected and is_selected function help
2016-11-09 08:45:53 +01:00
is_valid
[feature] is_valid expression
2019-11-18 02:31:48 +10:00
item_variables
[FEATURE] item_variables expression function inside compositions
2017-01-11 12:26:32 +10:00
json_to_map
[FEATURE] json_to_map() / map_to_json() expression functions
2018-09-14 11:21:40 +07:00
layer_property
Add path to layer_property expression function
2018-12-18 13:47:46 +01:00
left
…
length
More descriptive function help for area/length/perimeter functions
2016-02-23 11:48:10 +11:00
levenshtein
…
lighter
[FEATURE] add darker() and lighter() expression functions
2015-12-09 15:50:59 +11:00
LIKE
[BUGFIX] Expression in like escape % and _
2016-09-30 14:27:53 +02:00
line_interpolate_angle
[FEATURE] New expression functions for angle/distance interpolation
2016-08-29 11:02:17 +10:00
line_interpolate_point
[FEATURE] Add linear referencing functions to expression engine
2016-08-21 20:59:57 +10:00
line_locate_point
[FEATURE] Add linear referencing functions to expression engine
2016-08-21 20:59:57 +10:00
line_merge
[FEATURE] API + expression function for merging linestrings
2016-07-28 20:33:27 +10:00
line_substring
[FEATURE] line_substring function
2018-08-15 14:01:59 +10:00
ln
…
log
…
log10
…
longest_common_substring
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
lower
…
lpad
Update lpad and rpad functions description
2018-01-18 16:43:43 +10:00
m
[expressions] Allow make_point to accept z/m values, add new
2015-11-06 20:09:13 +11:00
majority
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
make_circle
add missing optional flag in some qgs expression helps
2018-10-25 18:20:23 +10:00
make_ellipse
add missing optional flag in some qgs expression helps
2018-10-25 18:20:23 +10:00
make_line
spelling fixes (closes #32408)
2019-10-26 10:50:30 +10:00
make_point
add missing optional flag in some qgs expression helps
2018-10-25 18:20:23 +10:00
make_point_m
[expressions] Allow make_point to accept z/m values, add new
2015-11-06 20:09:13 +11:00
make_polygon
add some optional flags in make_polygon expression
2019-02-20 05:41:26 +10:00
make_rectangle_3points
[feature] Add expression for square by diagonal and rectangle from 3 points
2019-01-17 03:42:20 +11:00
make_regular_polygon
add missing optional flag in some qgs expression helps
2018-10-25 18:20:23 +10:00
make_square
[feature] Add expression for square by diagonal and rectangle from 3 points
2019-01-17 03:42:20 +11:00
make_triangle
Add missing make_triangle function help. Fix #16406
2018-02-23 14:32:43 +01:00
map
Update map and array examples
2018-08-24 14:04:27 +02:00
Map Layers
Add items for project map layers and relations to expression builder
2017-07-31 08:08:18 +10:00
map_akeys
Update map and array examples
2018-08-24 14:04:27 +02:00
map_avals
Update map and array examples
2018-08-24 14:04:27 +02:00
map_concat
Update map and array examples
2018-08-24 14:04:27 +02:00
map_delete
Update map and array examples
2018-08-24 14:04:27 +02:00
map_exist
Add expression functions for arrays and maps
2016-09-20 13:22:55 +02:00
map_get
Add expression functions for arrays and maps
2016-09-20 13:22:55 +02:00
map_insert
Update map and array examples
2018-08-24 14:04:27 +02:00
map_to_hstore
[FEATURE] hstore_to_map() / map_to_hstore() expression functions
2018-09-14 11:21:40 +07:00
map_to_json
[FEATURE] json_to_map() / map_to_json() expression functions
2018-09-14 11:21:40 +07:00
Maps
Added new help files to the expression function groups of Arrays and Maps
2017-08-04 20:30:37 +02:00
Math
…
max
Add example with NULL value
2018-01-03 06:57:10 +01:00
max_length
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
maximum
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
md5
fix build
2019-10-26 08:32:26 +10:00
mean
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
median
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
min
Add example with NULL value
2018-01-03 06:57:10 +01:00
min_length
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
minimal_circle
add missing optional flag in some qgs expression helps
2018-10-25 18:20:23 +10:00
minimum
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
minority
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
minute
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
month
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
nodes_to_points
add missing optional flag in some qgs expression helps
2018-10-25 18:20:23 +10:00
NOT
…
now
Add note about now() being static to help
2018-08-25 13:52:33 +02:00
NULL
…
nullif
Fix JSON
2019-01-08 11:36:16 +01:00
num_geometries
corrections
2018-05-14 15:13:22 +02:00
num_interior_rings
[FEATURE] More geometry functions for expressions
2015-12-15 11:22:39 +11:00
num_points
…
num_rings
[FEATURE] More geometry functions for expressions
2015-12-15 11:22:39 +11:00
num_selected
Improve num_selected and is_selected function help
2016-11-09 08:45:53 +01:00
offset_curve
Spell check 'mitre' -> 'miter' (i.e. use en-us variation)
2017-08-07 18:08:57 +10:00
op_asterisk
…
op_concat
fix linebreaks in function help and CASE (fixes #14189)
2016-02-26 00:27:48 +01:00
op_div
…
op_eq
…
op_exp
…
op_ge
…
op_gt
…
op_index
More square brackets
2018-12-19 05:21:49 +10:00
op_le
…
op_lt
…
op_minus
…
op_modulo
…
op_ne
…
op_plus
…
op_regex
Add missing ~ operator to expression builder
2017-01-19 16:03:48 +10:00
Operators
…
OR
…
order_parts
Fix 2.5D renderer problem when order of walls matters
2016-01-15 16:23:13 +01:00
oriented_bbox
initial commit
2017-09-08 08:06:21 +02:00
overlaps
…
parameter
Move algorithm expression context generation to QgsProcessingAlgorithm
2017-06-06 11:25:09 +10:00
perimeter
More descriptive function help for area/length/perimeter functions
2016-02-23 11:48:10 +11:00
pi
…
point_n
[expression] Negative index support to point_n(), angle_at_vertex(), distance_to_vertex() functions
2019-03-13 11:20:04 +07:00
point_on_surface
[expression] add point_on_surface function
2015-12-12 17:16:34 +07:00
pole_of_inaccessibility
[FEATURE] pole_of_inaccessibility expression function
2016-11-14 15:52:41 +10:00
project
[FEATURE] New project(point, distance, bearing) expression function
2016-04-06 20:55:26 +10:00
project_color
…
q1
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
q3
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
radians
[Expression] radians and degrees
2015-12-10 00:41:42 +01:00
ramp_color
fix function call in example
2018-12-13 18:18:04 +02:00
rand
…
randf
[FEATURE] Allow expression functions to use named parameters
2016-04-04 13:59:13 +10:00
range
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
raster_statistic
[FEATURE] raster_statistic expression function for retrieving
2016-11-22 12:07:25 +10:00
raster_value
[FEATURE][expression] add raster_value() function (#7487)
2018-07-27 12:56:04 +07:00
Rasters
Add missing function group help
2019-05-22 03:45:00 +10:00
Recent
…
Record and Attributes
Add missing function group help
2019-05-22 03:45:00 +10:00
regexp_match
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
regexp_matches
Update map and array examples
2018-08-24 14:04:27 +02:00
regexp_replace
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
regexp_substr
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
relate
Add DE-9IM variant which tests against a specified pattern
2015-11-04 16:03:55 +11:00
relation_aggregate
Add "concatenate_unique" as aggregate parameter
2019-10-03 13:28:36 +10:00
Relations
Add items for project map layers and relations to expression builder
2017-07-31 08:08:18 +10:00
replace
[expression] further improve replace() to support a map argument
2016-10-27 11:33:28 +07:00
represent_value
Single parameter version of represent_value
2017-09-29 10:58:18 +02:00
reverse
[FEATURE] New 'reverse' expression for reversing linestrings
2015-11-26 16:53:55 +11:00
right
…
round
[FEATURE] Allow expression functions to use named parameters
2016-04-04 13:59:13 +10:00
rpad
Update lpad and rpad functions description
2018-01-18 16:43:43 +10:00
scale_exp
…
scale_linear
Change help answer to what is actually shown in the preview
2019-10-14 09:35:22 +10:00
second
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
segments_to_lines
[FEATURE] More geometry functions for expressions
2015-12-15 11:22:39 +11:00
set_color_part
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
sha256
fix build
2019-10-26 08:32:26 +10:00
shortest_line
expression help: support optional parameters and defaults
2018-05-10 20:15:39 +02:00
simplify
[FEATURE] New simplify + smoothing expression functions
2016-09-03 21:52:06 +10:00
simplify_vw
Replace "eg" by "e.g." or "for example"
2016-12-30 00:03:22 +01:00
sin
…
single_sided_buffer
Spell check 'mitre' -> 'miter' (i.e. use en-us variation)
2017-08-07 18:08:57 +10:00
smooth
[needs-docs] geometry smooth algorithm now also retains and smooths z/m values
2018-03-30 08:59:00 +11:00
soundex
…
sqlite_fetch_and_increment
spelling fixes (closes #32408)
2019-10-26 10:50:30 +10:00
sqrt
…
start_point
…
stdev
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
String
…
string_to_array
Update map and array examples
2018-08-24 14:04:27 +02:00
strpos
also update strpos function help (followup 2a557db)
2015-11-20 19:53:30 +01:00
substr
fix substr help (fixes #21192)
2019-02-07 11:17:57 +01:00
sum
[FEATURE] Aggregates for expressions
2016-05-17 10:53:25 +10:00
sym_difference
…
tan
…
tapered_buffer
[FEATURE] Add expression functions for tapered and variable
2018-05-01 06:16:01 +10:00
title
…
to_date
[expression] Language support for format_date() and to_{date,datetime,time}()
2019-11-18 12:13:47 +07:00
to_datetime
[expression] Language support for format_date() and to_{date,datetime,time}()
2019-11-18 12:13:47 +07:00
to_dm
[FEATURE] add conversion from float to DMS format
2018-09-14 05:18:38 +10:00
to_dms
[FEATURE] add conversion from float to DMS format
2018-09-14 05:18:38 +10:00
to_int
…
to_interval
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
to_json
Rename json functions to postgres names
2019-01-18 17:45:12 +07:00
to_real
…
to_string
…
to_time
[expression] Language support for format_date() and to_{date,datetime,time}()
2019-11-18 12:13:47 +07:00
touches
…
transform
…
translate
[FEATURE] Add translate expression function
2015-12-08 08:49:05 +01:00
trim
…
try
[expression] Add try() function to provide a way to detect and handle
2019-02-20 06:27:43 +07:00
union
…
upper
…
uuid
…
var
…
Variables
…
wedge_buffer
[FEATURE] Add wedge_buffer expression function
2018-04-24 10:07:51 +12:00
week
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
with_variable
Used named parameters for with_variable function
2018-08-23 21:15:32 +10:00
within
…
wordwrap
add missing optional flag in some qgs expression helps
2018-10-25 18:20:23 +10:00
x
Add more example
2016-05-24 12:21:00 +02:00
x_max
…
x_min
…
y
Add more example
2016-05-24 12:24:12 +02:00
y_max
…
y_min
…
year
Various fixes on date functions help
2019-09-27 17:44:11 +10:00
z
[expressions] Allow make_point to accept z/m values, add new
2015-11-06 20:09:13 +11:00