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Top Forums Shell Programming and Scripting Reading Multi Line SQL in UNIX Post 302961502 by ronitreddy on Tuesday 1st of December 2015 11:34:47 AM
Old 12-01-2015
Reading Multi Line SQL in UNIX

Hello,

Currently, I am reading few queries from the below .sql file

Code:
--SOURCE TABLE NAME
--SOURCE QUERY
SEL COL1, COL2, COL3, COL4, 
COL5, COL6, COL7 WHERE COL5 = '2015-11-04 16:24:00.000000' FROM SOURCE TABLE;

--TARGET TABLE NAME
--TARGET QUERY
SEL COLUMN1, COLUMN2, COLUMN3, COLUMN4, 
COLUMN5, COLUMN6, COLUMN7 FROM TARGET TABLE;
0,1

The code used to read the contents of the .sql file is being displayed below:

Code:
validate() {
    queryNum=0
    while true
    do
        ((queryNum++))
        read tableName
        read comment
        read sourceQuery 
        read blankLine
        read tableName
        read comment
        read targetQuery 
        read primaryKeyCols || break
        read blankLine
        exQuery "$sourceQuery" sourceResults.txt 
        exQuery "$targetQuery" targetResults.txt         
    done < $1
}

I am using Bash. The only disadvantage with this approach is, I can't read the SQL query if it is written in multi lines. It has to be on a single line to make it work.
I want to be more flexible while reading the queries. Is there any way that I can read the multi line SQL in unix. Please help me out.

Thanks for your help.

Regards,
R

---------- Post updated 12-01-15 at 11:30 AM ---------- Previous update was 11-30-15 at 01:28 PM ----------

---------- Post updated at 12:34 PM ---------- Previous update was at 11:30 AM ----------

Any insights on this?

Last edited by ronitreddy; 12-01-2015 at 12:34 PM..
 

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bup-margin(1)						      General Commands Manual						     bup-margin(1)

NAME
bup-margin - figure out your deduplication safety margin SYNOPSIS
bup margin [options...] DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids. For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by its first 46 bits. The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits, that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits with far fewer objects. If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if you're getting dangerously close to 160 bits. OPTIONS
--predict Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer from the guess. This is potentially useful for tuning an interpolation search algorithm. --ignore-midx don't use .midx files, use only .idx files. This is only really useful when used with --predict. EXAMPLE
$ bup margin Reading indexes: 100.00% (1612581/1612581), done. 40 40 matching prefix bits 1.94 bits per doubling 120 bits (61.86 doublings) remaining 4.19338e+18 times larger is possible Everyone on earth could have 625878182 data sets like yours, all in one repository, and we would expect 1 object collision. $ bup margin --predict PackIdxList: using 1 index. Reading indexes: 100.00% (1612581/1612581), done. 915 of 1612581 (0.057%) SEE ALSO
bup-midx(1), bup-save(1) BUP
Part of the bup(1) suite. AUTHORS
Avery Pennarun <apenwarr@gmail.com>. Bup unknown- bup-margin(1)
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