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Posted to issues@calcite.apache.org by "Joey Moore (Jira)" <ji...@apache.org> on 2023/04/06 17:08:00 UTC
[jira] [Updated] (CALCITE-3959) Implement BigQuery INSTR function
[ https://issues.apache.org/jira/browse/CALCITE-3959?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Joey Moore updated CALCITE-3959:
--------------------------------
Description:
BiqQuery supports the [INSTR|https://cloud.google.com/bigquery/docs/reference/standard-sql/string_functions#instr](source_value, search_value[, position[, occurrence]])) function which accepts 2 (character strings or binary strings), 1 optional int representing position, and 1 optional int representing occurrence.
Occurrence and position are assigned a default value of 1 if not specified.
The function returns the 1-based position of the nth occurrence of the 2nd operand in the 1st operand where n is defined by the 4th operand. The function begins searching at the 1-based position specified in the 3rd operand.
The function also supports negative position values, with -1 indicating the last character, and will search backwards from the position specified in that case.
Returns 0 if:
* No match is found.
* If occurrence is greater than the number of matches found.
* If position is greater than the length of source_value.
Returns NULL if:
* Any input argument is NULL.
Returns an error if:
* position is 0.
* occurrence is 0 or negative.
EXAMPLE: INSTR("abc", "bc") would return 2.
EXAMPLE: INSTR("abcabc", "bc", 3) would return 5.
EXAMPLE: INSTR("abcabc", "bc", -1, 1) would return 5.
EXAMPLE: INSTR("abcabc", "bc", -1, 2) would return 2.
was:Implement INSTR function
Summary: Implement BigQuery INSTR function (was: Implement INSTR function)
> Implement BigQuery INSTR function
> ---------------------------------
>
> Key: CALCITE-3959
> URL: https://issues.apache.org/jira/browse/CALCITE-3959
> Project: Calcite
> Issue Type: Wish
> Reporter: xzh_dz
> Assignee: Joey Moore
> Priority: Major
>
> BiqQuery supports the [INSTR|https://cloud.google.com/bigquery/docs/reference/standard-sql/string_functions#instr](source_value, search_value[, position[, occurrence]])) function which accepts 2 (character strings or binary strings), 1 optional int representing position, and 1 optional int representing occurrence.
> Occurrence and position are assigned a default value of 1 if not specified.
> The function returns the 1-based position of the nth occurrence of the 2nd operand in the 1st operand where n is defined by the 4th operand. The function begins searching at the 1-based position specified in the 3rd operand.
> The function also supports negative position values, with -1 indicating the last character, and will search backwards from the position specified in that case.
> Returns 0 if:
> * No match is found.
> * If occurrence is greater than the number of matches found.
> * If position is greater than the length of source_value.
> Returns NULL if:
> * Any input argument is NULL.
> Returns an error if:
> * position is 0.
> * occurrence is 0 or negative.
> EXAMPLE: INSTR("abc", "bc") would return 2.
> EXAMPLE: INSTR("abcabc", "bc", 3) would return 5.
> EXAMPLE: INSTR("abcabc", "bc", -1, 1) would return 5.
> EXAMPLE: INSTR("abcabc", "bc", -1, 2) would return 2.
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