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https://issues.apache.org/jira/browse/CALCITE-5451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jess Balint closed CALCITE-5451.
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Resolved in release 1.33.0 (2023-02-06)
> Implement LPAD() and RPAD() functions
> -------------------------------------
>
> Key: CALCITE-5451
> URL: https://issues.apache.org/jira/browse/CALCITE-5451
> Project: Calcite
> Issue Type: Improvement
> Reporter: Oliver Lee
> Assignee: Oliver Lee
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.33.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Adding in LPAD() and RPAD()for BIG_QUERY as per
> [https://g3doc.corp.google.com/company/teams/googlesql/reference/string_functions.md?cl=head#lpad]
> and
> [https://g3doc.corp.google.com/company/teams/googlesql/reference/string_functions.md?cl=head#rpad]
> describes
>
> {{LPAD(original_value, return_length[, pattern])}}
> {quote}Returns a {{STRING}} or {{BYTES}} value that consists of
> {{original_value}} prepended with {{{}pattern{}}}. The {{return_length}} is
> an {{INT64}} that specifies the length of the returned value. If
> {{original_value}} is of type {{{}BYTES{}}}, {{return_length}} is the number
> of bytes. If {{original_value}} is of type {{{}STRING{}}}, {{return_length}}
> is the number of characters.
> The default value of {{pattern}} is a blank space.
> Both {{original_value}} and {{pattern}} must be the same data type.
> If {{return_length}} is less than or equal to the {{original_value}} length,
> this function returns the {{original_value}} value, truncated to the value of
> {{{}return_length{}}}. For example, {{LPAD('hello world', 7);}} returns
> {{{}'hello w'{}}}.
> If {{{}original_value{}}}, {{{}return_length{}}}, or {{pattern}} is
> {{{}NULL{}}}, this function returns {{{}NULL{}}}.
> This function returns an error if:
> * {{return_length}} is negative
> * {{pattern}} is empty{quote}
>
> LPAD Examples:
> LPAD('12345', 8, 'a') -> "aaa12345"
> LPAD('12345', 8) -> " 12345"
> LPAD('12345', 8, 'ab') -> "aba12345"
> LPAD('12345', 8, 'a') -> "aaa12345"
> LPAD('12345', -3) -> error
> LPAD('12345', 3, '') -> error
>
> ----
>
> {{RPAD(original_value, return_length[, pattern])}}
>
> {quote}Returns a {{STRING}} or {{BYTES}} value that consists of
> {{original_value}} appended with {{{}pattern{}}}. The {{return_length}}
> parameter is an {{INT64}} that specifies the length of the returned value. If
> {{original_value}} is {{{}BYTES{}}}, {{return_length}} is the number of
> bytes. If {{original_value}} is {{{}STRING{}}}, {{return_length}} is the
> number of characters.
> The default value of {{pattern}} is a blank space.
> Both {{original_value}} and {{pattern}} must be the same data type.
> If {{return_length}} is less than or equal to the {{original_value}} length,
> this function returns the {{original_value}} value, truncated to the value of
> {{{}return_length{}}}. For example, {{RPAD('hello world', 7);}} returns
> {{{}'hello w'{}}}.
> If {{{}original_value{}}}, {{{}return_length{}}}, or {{pattern}} is
> {{{}NULL{}}}, this function returns {{{}NULL{}}}.
> This function returns an error if:
> * {{return_length}} is negative
> * {{pattern}} is empty{quote}
>
> RPAD Examples:
> RPAD('12345', 8, 'a') -> "12345aaa"
> RPAD('12345', 8) -> "12345. "
> RPAD('12345', 8, 'ab') -> "12345aba"
> RPAD('12345', 8, 'a') -> "12345aaa"
> RPAD('12345', -3) -> error
> RPAD('12345', 3, '') -> error
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