PostgreSql , extract schema objects DDL to separate SQL file

问题

I want to export all objects DDL to separate file example (table_a_create.sql, view_b_create.sql, trigger_c_create.sql, table_contraints.sql ...)

I was trying with pg_dump but it only exports to one file for the whole schema.

I read some questions about this on stackoverflow but still not enough for my requirement

Ex: How to dump PostgreSQL database structure (each object in separate file)

Is there any way to do it? I'm using Windows

回答1:

If you are on the client machine, you can put this in a SQL script (e.g. export_plpgsql.sql) :

\pset tuples_only on
\pset footer off
\set QUIET on
\pset format unaligned
\set QUIET off

SELECT '\echo ''* Export '||(CASE proKind WHEN 'f' THEN 'Function' ELSE 'Procedure' END)||' : '||proName||''''
       ||chr(10)||'\copy (SELECT pg_get_functiondef('||p.oid||')) TO '''||:'export_path'||'/'||upper(proName)
       ||(CASE proKind WHEN 'f' THEN '.fct' ELSE '.prc' END)||''' WITH CSV;' as export_routine
FROM pg_proc p
WHERE proNamespace = (SELECT oid FROM pg_namespace WHERE nspName = lower(:'schema_name'))
ORDER BY proName;

and call it using 2 arguments : schema_name and export_path, for example :

psql -U my_ -d my_db -v schema_name=my_schema -v export_path=C:/temp/export_PG -f export_plpgsql.sql > C:\temp\export_plpgsql.gen.sql

This will generate a script containing all the exports command for your plpgsql routines, e.g.

\copy (SELECT pg_get_functiondef(51296)) TO 'C:/temp/export_PG/my_procedure.prc' WITH CSV;

Last step : run the generated script

psql -U my_ -d my_db -f C:\temp\export_plpgsql.gen.sql

It will generate a .prc file for each procedure and a .fct file for each function. NB: You may have to refine the script as you can have other kind of functions (proKind) in pg_proc view.

来源：https://stackoverflow.com/questions/58869245/postgresql-extract-schema-objects-ddl-to-separate-sql-file

标签

postgresql

pg-dump