java - how to fix error on -

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i have sql request 

delete bc_udv3_roles  permission_id = 'x' or       0 < (select * bc_udv3_roles             "substr"(permission_id, 0, 1)='d')  or '1'='1'

when execute error

please help, how can fix it?

delete bc_udv3_roles permission_id = 'x' or 0 < (select count(*) bc_udv3_roles substring(permission_id, 1, 1)='d')

or '1'='1' condition evaluates true. not needed.

also if using mysql function should substring instead of substr. there should no quotes around function name. can't compare 0 columns in table. use count(*) instead.

alternately can try

delete bc_udv3_roles permission_id = 'x' or substring(permission_id, 1, 1)='d'

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