76 lines
2.7 KiB
MySQL
76 lines
2.7 KiB
MySQL
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-- -----------------------------------------------------------------------------------
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-- File Name : https://oracle-base.com/dba/script_creation/drop_cons_on_table.sql
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-- Author : Tim Hall
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-- Description : Creates the DDL to drop the UK & PK constraints on the specified table, or all tables.
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-- Call Syntax : @drop_cons_on_table (table-name or all) (schema)
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-- Last Modified: 28/01/2001
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-- -----------------------------------------------------------------------------------
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SET SERVEROUTPUT ON
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SET LINESIZE 100
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SET VERIFY OFF
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SET FEEDBACK OFF
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PROMPT
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DECLARE
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CURSOR cu_cons IS
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SELECT *
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FROM all_constraints a
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WHERE a.table_name = Decode(Upper('&&1'),'ALL',a.table_name,Upper('&&1'))
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AND a.owner = Upper('&&2')
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AND a.constraint_type IN ('P','U');
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-- ----------------------------------------------------------------------------------------
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FUNCTION Con_Columns(p_tab IN VARCHAR2,
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p_con IN VARCHAR2)
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RETURN VARCHAR2 IS
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-- ----------------------------------------------------------------------------------------
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CURSOR cu_col_cursor IS
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SELECT a.column_name
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FROM all_cons_columns a
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WHERE a.table_name = p_tab
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AND a.constraint_name = p_con
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AND a.owner = Upper('&&2')
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ORDER BY a.position;
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l_result VARCHAR2(1000);
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BEGIN
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FOR cur_rec IN cu_col_cursor LOOP
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IF cu_col_cursor%ROWCOUNT = 1 THEN
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l_result := cur_rec.column_name;
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ELSE
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l_result := l_result || ',' || cur_rec.column_name;
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END IF;
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END LOOP;
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RETURN Lower(l_result);
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END;
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-- ----------------------------------------------------------------------------------------
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BEGIN
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DBMS_Output.Disable;
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DBMS_Output.Enable(1000000);
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DBMS_Output.Put_Line('PROMPT');
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DBMS_Output.Put_Line('PROMPT Droping Constraints on ' || Upper('&&1'));
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FOR cur_rec IN cu_cons LOOP
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IF cur_rec.constraint_type = 'P' THEN
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DBMS_Output.Put_Line('ALTER TABLE ' || Lower(cur_rec.table_name) || ' DROP PRIMARY KEY;');
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ELSIF cur_rec.constraint_type = 'R' THEN
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DBMS_Output.Put_Line('ALTER TABLE ' || Lower(cur_rec.table_name) || ' DROP CONSTRAINT ' || Lower(cur_rec.constraint_name) || ';');
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ELSIF cur_rec.constraint_type = 'U' THEN
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DBMS_Output.Put_Line('ALTER TABLE ' || Lower(cur_rec.table_name) || ' DROP UNIQUE (' || Con_Columns(cur_rec.table_name, cur_rec.constraint_name) || ');');
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END IF;
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END LOOP;
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END;
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/
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PROMPT
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SET VERIFY ON
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SET FEEDBACK ON
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