Revision 10296
Added by Aaron Marcuse-Kubitza almost 11 years ago
| util.sql | ||
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| 1023 | 1023 |
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-- |
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-- Name: mk_derived_col(col_ref, text); Type: FUNCTION; Schema: util; Owner: - |
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-- Name: mk_derived_col(col_ref, text, boolean); Type: FUNCTION; Schema: util; Owner: -
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-- |
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CREATE FUNCTION mk_derived_col(col col_ref, expr text) RETURNS void |
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CREATE FUNCTION mk_derived_col(col col_ref, expr text, overwrite boolean DEFAULT false) RETURNS void
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LANGUAGE plpgsql STRICT |
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AS $_$ |
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DECLARE |
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type regtype = util.typeof(expr, col.table_::text::regtype); |
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col_name_sql text = quote_ident(col.name); |
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BEGIN |
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PERFORM util.create_if_not_exists($$ |
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ALTER TABLE $$||col.table_||$$ ADD COLUMN $$||col_name_sql||$$ $$||type||$$; |
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PERFORM util.create_if_not_exists((CASE WHEN overwrite THEN '' ELSE $$
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ALTER TABLE $$||col.table_||$$ ADD COLUMN $$||col_name_sql||$$ $$||type||$$;$$ END)||$$
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ALTER TABLE $$||col.table_||$$ ALTER COLUMN $$||col_name_sql||$$ TYPE $$||type||$$ USING |
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$$||expr||$$; |
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$$); |
| ... | ... | |
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-- |
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-- Name: FUNCTION mk_derived_col(col col_ref, expr text); Type: COMMENT; Schema: util; Owner: - |
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-- Name: FUNCTION mk_derived_col(col col_ref, expr text, overwrite boolean); Type: COMMENT; Schema: util; Owner: -
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-- |
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COMMENT ON FUNCTION mk_derived_col(col col_ref, expr text) IS 'idempotent'; |
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COMMENT ON FUNCTION mk_derived_col(col col_ref, expr text, overwrite boolean) IS 'idempotent';
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| 1050 | 1050 |
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| 1051 | 1051 |
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-- |
Also available in: Unified diff
schemas/util.sql: mk_derived_col(): support using this function to overwrite an existing column (i.e. as a general-purpose function to perform in-place update with ALTER COLUMN TYPE USING)