POST data:
{"options":{"label":"string_comb1","type":"string","visible":true,"originType":"string","expr":{"kind":"formula","op":"substring(trim({director}),length(trim({director}))-2,3)"}}}
{"version":"2.0.0-SNAPSHOT@7801108","code":10013,"msg":"数据库错误","error":"error/db-error","debug":"ERROR: function pg_catalog.substring(text, bigint, integer) does not exist\n 建议：No function matches the given name and argument types. You might need to add explicit type casts.\n 位置：53"}
POST https://develop.hengshi.org/api/apps/861/datasets/2660/fields/verify （jmeter/jmeter)
POST data: {"options":{"label":"string_comb1","type":"string","visible":true,"originType":"string","expr":{"kind":"formula","op":"substring(trim({director}),length(trim({director}))-2,3)"}}}
{"version":"2.0.0-SNAPSHOT@7801108","code":10013,"msg":"数据库错误","error":"error/db-error","debug":"ERROR: function pg_catalog.substring(text, bigint, integer) does not exist\n 建议：No function matches the given name and argument types. You might need to add explicit type casts.\n 位置：53"}