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feat: add string trimming and padding functions (#248)
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@richtia
richtia authored Jul 28, 2022
1 parent 1b9a45f commit 8a8f65d
Showing 1 changed file with 158 additions and 3 deletions.
161 changes: 158 additions & 3 deletions extensions/functions_string.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,9 @@ scalar_functions:
return: "BOOLEAN"
-
name: substring
description: Extract a portion of a string from another string.
description: >-
Extract a substring of a specified length starting from position start.
A start value of 1 refers to the first characters of the string.
impls:
- args:
- value: "varchar<L1>"
Expand All @@ -44,7 +46,7 @@ scalar_functions:
- value: i32
- value: i32
return: "string"
-
-
name: starts_with
description: Whether this string starts with another string.
impls:
Expand Down Expand Up @@ -222,7 +224,8 @@ scalar_functions:
name: "substring"
description: The substring to count.
return: i64
- name: replace
-
name: replace
description: >-
Replace all occurrences of the substring with the replacement string.
impls:
Expand All @@ -248,3 +251,155 @@ scalar_functions:
name: "replacement"
description: The replacement string.
return: "varchar<L1>"
-
name: ltrim
description: >-
Remove any occurrence of the characters from the left side of the string.
If no characters are specified, spaces are removed.
impls:
- args:
- value: "varchar<L1>"
name: "input"
description: "The string to remove characters from."
- value: "varchar<L2>"
name: "characters"
description: "The set of characters to remove."
return: "varchar<L1>"
- args:
- value: "string"
name: "input"
description: "The string to remove characters from."
- value: "string"
name: "characters"
description: "The set of characters to remove."
return: "string"
-
name: rtrim
description: >-
Remove any occurrence of the characters from the right side of the string.
If no characters are specified, spaces are removed.
impls:
- args:
- value: "varchar<L1>"
name: "input"
description: "The string to remove characters from."
- value: "varchar<L2>"
name: "characters"
description: "The set of characters to remove."
return: "varchar<L1>"
- args:
- value: "string"
name: "input"
description: "The string to remove characters from."
- value: "string"
name: "characters"
description: "The set of characters to remove."
return: "string"
-
name: trim
description: >-
Remove any occurrence of the characters from the left and right sides of
the string. If no characters are specified, spaces are removed.
impls:
- args:
- value: "varchar<L1>"
name: "input"
description: "The string to remove characters from."
- value: "varchar<L2>"
name: "characters"
description: "The set of characters to remove."
return: "varchar<L1>"
- args:
- value: "string"
name: "input"
description: "The string to remove characters from."
- value: "string"
name: "characters"
description: "The set of characters to remove."
return: "string"
-
name: lpad
description: >-
Left-pad the input string with the string of 'characters' until the specified length of the
string has been reached. If the input string is longer than 'length', remove characters from
the right-side to shorten it to 'length' characters. If the string of 'characters' is longer
than the remaining 'length' needed to be filled, only pad until 'length' has been reached.
If 'characters' is not specified, the default value is a single space.
impls:
- args:
- value: "varchar<L1>"
name: "input"
description: "The string to pad."
- value: i32
name: "length"
description: "The length of the output string."
- value: "varchar<L2>"
name: "characters"
description: "The string of characters to use for padding."
return: "varchar<L1>"
- args:
- value: "string"
name: "input"
description: "The string to pad."
- value: i32
name: "length"
description: "The length of the output string."
- value: "string"
name: "characters"
description: "The string of characters to use for padding."
return: "string"
-
name: rpad
description: >-
Right-pad the input string with the string of 'characters' until the specified length of the
string has been reached. If the input string is longer than 'length', remove characters from
the left-side to shorten it to 'length' characters. If the string of 'characters' is longer
than the remaining 'length' needed to be filled, only pad until 'length' has been reached.
If 'characters' is not specified, the default value is a single space.
impls:
- args:
- value: "varchar<L1>"
name: "input"
description: "The string to pad."
- value: i32
name: "length"
description: "The length of the output string."
- value: "varchar<L2>"
name: "characters"
description: "The string of characters to use for padding."
return: "varchar<L1>"
- args:
- value: "string"
name: "input"
description: "The string to pad."
- value: i32
name: "length"
description: "The length of the output string."
- value: "string"
name: "characters"
description: "The string of characters to use for padding."
return: "string"
-
name: left
description: Extract count characters starting from the left of the string.
impls:
- args:
- value: "varchar<L1>"
- value: i32
return: "varchar<L1>"
- args:
- value: "string"
- value: i32
return: "string"
-
name: right
description: Extract count characters starting from the right of the string.
impls:
- args:
- value: "varchar<L1>"
- value: i32
return: "varchar<L1>"
- args:
- value: "string"
- value: i32
return: "string"

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