# 判断表是否存在 存在返回 1
SELECT
COUNT(1) as cnt
FROM pg_class c LEFT JOIN pg_namespace n ON (n.oid = c.relnamespace)
WHERE n.nspname = 'open'
AND c.relname = 't_daily_bank_data';
# 检查某个表是否存在
SELECT
TABLE_NAME
FROM information_schema.TABLES
WHERE table_schema='open'
AND TABLE_NAME='ads_trans';
gp判断表是否存在
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