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If delimiter is NULL, each character in the string will become a separate row of the result. If delimiter is an empty string, then the string is treated as a single field. If null_string is supplied and is not NULL, fields matching that string are replaced by NULL.","description_html":"Splits the \u003cem class=\"parameter\"\u003e\u003ccode\u003estring\u003c/code\u003e\u003c/em\u003e at occurrences of \u003cem class=\"parameter\"\u003e\u003ccode\u003edelimiter\u003c/code\u003e\u003c/em\u003e and returns the resulting fields as a set of \u003ccode class=\"type\"\u003etext\u003c/code\u003e rows. If \u003cem class=\"parameter\"\u003e\u003ccode\u003edelimiter\u003c/code\u003e\u003c/em\u003e is \u003ccode class=\"literal\"\u003eNULL\u003c/code\u003e, each character in the \u003cem class=\"parameter\"\u003e\u003ccode\u003estring\u003c/code\u003e\u003c/em\u003e will become a separate row of the result. If \u003cem class=\"parameter\"\u003e\u003ccode\u003edelimiter\u003c/code\u003e\u003c/em\u003e is an empty string, then the \u003cem class=\"parameter\"\u003e\u003ccode\u003estring\u003c/code\u003e\u003c/em\u003e is treated as a single field. If \u003cem class=\"parameter\"\u003e\u003ccode\u003enull_string\u003c/code\u003e\u003c/em\u003e is supplied and is not \u003ccode class=\"literal\"\u003eNULL\u003c/code\u003e, fields matching that string are replaced by \u003ccode class=\"literal\"\u003eNULL\u003c/code\u003e.","description_zh":"在出现 delimiter 时拆分 string，并将结果字段作为 text 行的集合返回。如果 delimiter 为 NULL，则 string 中的每个字符将成为结果的单独一行。如果 delimiter 为空字符串，则将 string 视为单个字段。如果提供了 null_string，并且不是 NULL，则匹配该字符串的字段将被 NULL 替换。","description_zh_html":"在出现 \u003cem class=\"parameter\"\u003e\u003ccode\u003edelimiter\u003c/code\u003e\u003c/em\u003e 时拆分 \u003cem class=\"parameter\"\u003e\u003ccode\u003estring\u003c/code\u003e\u003c/em\u003e，并将结果字段作为 \u003ccode class=\"type\"\u003etext\u003c/code\u003e 行的集合返回。如果 \u003cem class=\"parameter\"\u003e\u003ccode\u003edelimiter\u003c/code\u003e\u003c/em\u003e 为 \u003ccode class=\"literal\"\u003eNULL\u003c/code\u003e，则 \u003cem class=\"parameter\"\u003e\u003ccode\u003estring\u003c/code\u003e\u003c/em\u003e 中的每个字符将成为结果的单独一行。如果 \u003cem class=\"parameter\"\u003e\u003ccode\u003edelimiter\u003c/code\u003e\u003c/em\u003e 为空字符串，则将 \u003cem class=\"parameter\"\u003e\u003ccode\u003estring\u003c/code\u003e\u003c/em\u003e 视为单个字段。如果提供了 \u003cem class=\"parameter\"\u003e\u003ccode\u003enull_string\u003c/code\u003e\u003c/em\u003e，并且不是 \u003ccode class=\"literal\"\u003eNULL\u003c/code\u003e，则匹配该字符串的字段将被 \u003ccode class=\"literal\"\u003eNULL\u003c/code\u003e 替换。","examples":[{"expr":"string_to_table('xx~^~yy~^~zz', '~^~', 'yy')","result":"xx\nNULL\nzz"}],"html":"\u003ccode class=\"function\"\u003estring_to_table\u003c/code\u003e ( \u003cem class=\"parameter\"\u003e\u003ccode\u003estring\u003c/code\u003e\u003c/em\u003e \u003ccode class=\"type\"\u003etext\u003c/code\u003e, \u003cem class=\"parameter\"\u003e\u003ccode\u003edelimiter\u003c/code\u003e\u003c/em\u003e \u003ccode class=\"type\"\u003etext\u003c/code\u003e [\u003cspan class=\"optional\"\u003e, \u003cem class=\"parameter\"\u003e\u003ccode\u003enull_string\u003c/code\u003e\u003c/em\u003e \u003ccode class=\"type\"\u003etext\u003c/code\u003e\u003c/span\u003e] ) → \u003ccode class=\"returnvalue\"\u003esetof text\u003c/code\u003e","returns":"setof text","text":"string_to_table ( string text, delimiter text [, null_string text] ) → setof text","zh_from":"same-version-manual"}}],"Spellings":null,"SQLState":null,"Evidence":null}