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59 lines
1.4 KiB
Python
59 lines
1.4 KiB
Python
#coding:utf-8
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"""
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ID: issue-4767
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ISSUE: 4767
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TITLE: Positioned UPDATE statement prohibits index usage for the subsequent cursor field references
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DESCRIPTION:
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JIRA: CORE-4447
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FBTEST: bugs.core_4447
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"""
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import pytest
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from firebird.qa import *
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init_script = """
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recreate table ts(id int, x int, y int, z int, constraint ts_pk_id primary key (id) );
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recreate table tt(x int, y int, z int, constraint tt_pk_xy primary key (x,y) );
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commit;
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insert into ts
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select row_number()over(), rand()*10, rand()*10, rand()*10
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from rdb$types;
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commit;
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insert into tt select distinct x,y,0 from ts;
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commit;
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"""
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db = db_factory(init=init_script)
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test_script = """
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set planonly;
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set term ^;
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execute block as
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begin
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for select id,x,y,z from ts as cursor c
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do begin
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update ts set id = id where current of c; -- <<<<<<<<<<<<<<< ::: NB ::: we lock record in source using "current of" clause
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update tt t set t.z = t.z + c.z where t.x=c.x and t.y = c.y;
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end
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end
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^ set term ;^
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set planonly;
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"""
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act = isql_act('db', test_script, substitutions = [('(--\\s+)?line \\d+, col(umn)? \\d+', '')])
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expected_stdout = """
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PLAN (T INDEX (TT_PK_XY))
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PLAN (C TS NATURAL)
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"""
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@pytest.mark.version('>=3.0')
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def test_1(act: Action):
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act.expected_stdout = expected_stdout
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act.execute()
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assert act.clean_stdout == act.clean_expected_stdout
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