Lets say in the employee table, I have created an index(idx_name) on the emp_name column of the table.
When i add more than one Fieldable to my Document i get a nullpointer exception(without any exception description) when i try to add the document to the indexwriter.
Suppose I have a table STOCKCODE, DATETIME, PRICE I want to perform a basic query such as finding the maximum price between 12.00 PM and 3.00 PM on a given date for a given stock.Currently I index b
This question already has answers here: Closed 11 years ago. 开发者_如何学PythonPossible Duplicate:
I\'ve been trying and googling everything and still can\'t figure out what\'s going on. I have a big table (100M+rows). Among others it has 3 columns: user_id, date, type.
I know this is a simple question but difficult to formulate in one sentence to google the answer.So, I have a 3d matrix with size 2x2x3 like this
Mysql does not 开发者_StackOverflow社区prevent the creation of an index for the same column(s) when different index names are used. I guess that internally only one index is created and updated, but I
I have a \'users\' table with two columns, \'email\' and \'new_email\'. I need: A case-insensitive uniqueness constraint covering both columns - i.e., if \"Bob@Example.com\" appears in one row\'s \'
Currently, MongoDB supports only one geospatial index pe开发者_如何学Pythonr collection. How can I workaround this manually?
Let\'s say I have a table like this: CREATE TABLE t( [guid] [uniqueidentifier] NOT NULL, [category] [nvarchar](400)
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