正则表达式提取Javascript中两个字符串之间的行

Question

I have text with SAS code in it. Essentially it is SQL query wrapped between

    PROC SQL;
    .
    .
    .
    .
    .
    QUIT;

I am trying to extract SQL in between as a single match.

This is how my text file looks like

***logic 1***
proc sql;
 create table Combined as
  select t1.name, t2.units
  from mdweop.candy_customers_azim_056 as t1
  inner join mdweop.candy_sales_history_set  t2 on (t1.custid = t2.ORIGTN_ACCT_NO);
quit;

***logic 2***
PROC SQL;
 CREATE TABLE COMBINED AS
  SELECT T1.RPOG_HMDA_CODES, T2.RSN_DECL1_C
  FROM MDWEOP.CANDY_CUSTOMERS AS T1
  INNER JOIN MDWEOP.CANDY_SALES_HISTORY AS T2
    ON (T1.CUSTID = T2.ACA_MISC_Z03HMDA_BV);
QUIT;

***logic 3***
PROC SQL;
 CREATE TABLE COMBINED AS
  SELECT T1.RRG_PRPS_CODES, T2.RSN_DECL1_C
  FROM MDWEOP.CANDY_CUSTOMERS AS T1
  INNER JOIN MDWEOP.CANDY_SALES_HISTORY AS T2
    ON (T1.CUSTID = T2.ACA_MISC_Z03HMDA_BV);
QUIT;

I tried this regex but its finding each line as single individual match.

Ideally if i want to extract each SQL query from the text file

Any leads are well appreciated.

Answer 1

You can add the s modifier to your regex which allows the . character to also match newlines, and i for matching case variation. Also use non-capturing groups for the prefix and suffix:

/^(?:START\-OF\-FIELDS)(.*)(?:END\-OF\-FIELDS)$/mgsi

See it in action here

Answer 2

I've a doubt that this will solve your real problem to get SQL or not? , But I've posted this answer as per your regex demo.

 const regex = /START-OF-FIELDS[\\r\\n]+(.*)[\\n\\r]+(.*)[\\n\\r](.*)[\\n\\r]END-OF-FIELDS/img; const str = `START-OF-FIELDS Line A Line B Line C END-OF-FIELDS`; let m; const sql_lines = [] while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { if (groupIndex > 0) { sql_lines.push(match); } }); } console.log(sql_lines)