`regexp_count` / `regexp_instr` / `regexp_like`
已记录的来源状态与原始语言说明；缺少版本证据时明确标为未知。
来源快照记录 PostgreSQL 8.1–18 的变化节点；历史矩阵独立记录 7.4–18 的状态。两者均未记录 PostgreSQL 19 或 20 的支持状态，较新版本明确保留为未知。这些来源声明与运行测量相互独立。
SQL
说明
新增 regexp_count、regexp_instr 和 regexp_like，分别用于统计匹配次数、返回第 N 次匹配的位置，以及判断字符串是否匹配正则表达式。
所选版本: PostgreSQL 18
支持
比较版本
原始文档链接
已记录旧标识: 367
完整来源事实与出处
yaml · center · 1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd
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"Texts": [
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"BodyHTML": "\u003cul\u003e\n\u003cli\u003e\u003ccode\u003eregexp_count\u003c/code\u003e: counts the number of places that match the regular expression in a string\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eregexp_instr \u003c/code\u003e: returns the starting of the Nth match of a regular expression in a sting\u003c/li\u003e\n\u003cli\u003e\u003ccode\u003eregexp_like\u003c/code\u003e: returns true if a regular expression has a match in a string.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003e\u003ca href=\"https://www.postgresql.org/docs/15/functions-matching.html#FUNCTIONS-POSIX-REGEXP\" rel=\"nofollow\"\u003ehttps://www.postgresql.org/docs/15/functions-matching.html#FUNCTIONS-POSIX-REGEXP\u003c/a\u003e\u003c/p\u003e\n",
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