Question

Question:

Given a SQL string like

CREATE VIEW TestView AS
SELECT value1, value2 
FROM TABLE_0
UNION
(SELECT * FROM TABLE_2) AS value1
,value2 
FROM TABLE_12 
UNION
SELECT * FROM TABLE_3

(in lowercase)

And an array of string like

string[] tables = new string[]{"table_1", "table_2", "table_3"}

Now I did:

if (strViewDefinition.Contains(strObjectName)) // aaaaargh

for each strObjectName in tables, to check whether or not the view depends on this object.

But this fails on table_12 (and results in cyclic dependencies) for example, because tables contains “table_1”. Aaargh.

I need a regex that can check if the view definition contains a function name, table-valued function or another view…

(
For checking with
System.Text.RegularExpressions.Regex.IsMatch(
)

My trial was:

string whateverneedsescaping= System.Text.RegularExpressions.Regex.Escape(@"+-*\/%=,\n\r");
string fieldsep = @"[\s\n\r," + whateverneedsescaping+ "]*";
string strPattern = fieldsep + "VIEW/FUNCTION_NAME" + fieldsep;

But it fails, plus it doesn’t account for object names embraced in brackets, like

 "[TABLE_NAME]"

Anybody can help ?

Answer 1

This does the job:

string strSchema = "dbo";
string strRegexObjectName = System.Text.RegularExpressions.Regex.Escape(strObjectName);
string strPattern = @"[\s\+\-\(,/%=\*\\](\[?" + strSchema + @"\]?\.)?\[?" + strRegexObjectName + @"\]?([\s\+\-\),/%=\*\\]|$)";