postgresql varchar字段regexp_replace正則替換

1.替換目标

1）.contact字段類型 varchar。

2）.去掉字段中連續的兩個，每個等号後面數字不同，effective_caller_id_name=051066824513,effective_caller_id_number=051066824513。

2.查詢原字段内容

select contact

from pbx_agents

where contact ~ 'effective_caller_id_name=' limit 2

"{sip_append_audio_sdp=a=fmtp:18 annexb=no,call_timeout=60,effective_caller_id_name=051066824513,effective_caller_id_number=051066824513,cti_account=9,cti_agent_id=1102441276,cti_account_sid=5be394c3f8754bd89b9618937c687068,absolute_codec_string=\'OPUS,G729 (...)"

"{sip_append_audio_sdp=a=fmtp:18 annexb=no,call_timeout=60,effective_caller_id_name=051066824824,effective_caller_id_number=051066824824,cti_account=9,cti_agent_id=1103211003,cti_account_sid=4f3fae0e71b74bdaa3824e6ec7771815,absolute_codec_string=\'OPUS,G729 (...)"

3.查詢語句驗證替換

select regexp_replace(contact, '(effective_caller_id_name=\d+,)+?','','g')

where contact ~ 'effective_caller_id_name='

"{sip_append_audio_sdp=a=fmtp:18 annexb=no,call_timeout=60,effective_caller_id_number=051066824513,cti_account=9,cti_agent_id=1102441276,cti_account_sid=5be394c3f8754bd89b9618937c687068,absolute_codec_string=\'OPUS,G729\'}sofia/gateway/agentProxy/1102441276"

"{sip_append_audio_sdp=a=fmtp:18 annexb=no,call_timeout=60,effective_caller_id_number=051066824824,cti_account=9,cti_agent_id=1103211003,cti_account_sid=4f3fae0e71b74bdaa3824e6ec7771815,absolute_codec_string=\'OPUS,G729\'}sofia/gateway/agentProxy/1103211003"

4.執行替換操作

update pbx_agents set contact = regexp_replace(contact, '(effective_caller_id_name=\d+,)+?','','g')

Query returned successfully: 3929 rows affected, 505 msec execution time.

5.查詢驗證替換

"{sip_append_audio_sdp=a=fmtp:18 annexb=no,call_timeout=60,cti_account=9,cti_agent_id=1100891004,cti_account_sid=23869df09f2f47f0ae80a7cbc45e5185,absolute_codec_string=\'OPUS,G729\'}sofia/gateway/agentProxy/1100891004"

"{sip_append_audio_sdp=a=fmtp:18 annexb=no,call_timeout=60,cti_account=9,cti_agent_id=1102081069,cti_account_sid=9f2c1574fcb5497994cb9b892aee0d1c,absolute_codec_string=\'OPUS,G729\'}sofia/gateway/agentProxy/1102081069"

本文轉自 pgmia 51CTO部落格，原文連結:http://blog.51cto.com/heyiyi/2070512