power and pow are synonyms (except in for some dialects)

[dataders]

This is a:

• bug fix PR with no breaking changes — please ensure the base branch is master
• new functionality — please ensure the base branch is the latest dev/ branch
• a breaking change — please ensure the base branch is the latest dev/ branch

Description & motivation

TIL that TSQL does not have have pow() only power(). I was about ready to implement a dbt_utils.pow() macro, until I realized in most dialects, both are supported as synonyms see below.

I'm happy to make a dbt_utils.pow() macro, but think this change is much simpler -- especially because pow is only used in dbt_utils.generate_series()

dialects that support both POW and POWER:

• Snowflake POW,POWER
• BigQuery POWER
• Redshift POWER
• PostGres: can't find a canonical source saying they are synonyms, but the current docs lists power() but version 7.3 lists pow()
• Spark SQL
• und so weiter

Dialects that only support POWER

• TSQL
• Exasol: also only supports POWER

Checklist

• I have verified that these changes work locally on the following warehouses (Note: it's okay if you do not have access to all warehouses, this helps us understand what has been covered)
  • BigQuery
  • Postgres
  • Redshift
  • Snowflake
• I have updated the README.md (if applicable)
• I have added tests & descriptions to my models (and macros if applicable)
• I have added an entry to CHANGELOG.md

[jtcohen6]

Good by me, @swanderz! Thanks for the research that went into this one.