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qc: Add minimal support for qc_get_prepare_name

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If the query is a PREPARE or EXECUTE statement, then qc_get_prepare_name
will return the name of the prepared statement.
This commit is contained in:
Johan Wikman
2016-10-26 12:48:48 +03:00
parent 19e017e499
commit 7499c1e1bf
5 changed files with 104 additions and 1 deletions
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21
include/maxscale/query_classifier.h
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@ -17,7 +17,7 @@
MXS_BEGIN_DECLS
#define QUERY_CLASSIFIER_VERSION {1, 0, 0}
#define QUERY_CLASSIFIER_VERSION {1, 1, 0}
/**
* qc_query_type_t defines bits that provide information about a
@ -115,6 +115,7 @@ typedef struct query_classifier
bool (*qc_query_has_clause)(GWBUF* stmt);
char* (*qc_get_affected_fields)(GWBUF* stmt);
char** (*qc_get_database_names)(GWBUF* stmt, int* size);
char* (*qc_get_prepare_name)(GWBUF* stmt);
} QUERY_CLASSIFIER;
/**
@ -266,6 +267,24 @@ char** qc_get_database_names(GWBUF* stmt, int* size);
*/
qc_query_op_t qc_get_operation(GWBUF* stmt);
/**
* Returns the name of the prepared statement, if the statement
* is a PREPARE or EXECUTE statement.
*
* @param stmt A buffer containing a COM_QUERY packet.
*
* @return The name of the prepared statement, if the statement
* is a PREPARE or EXECUTE statement; otherwise NULL.
*
* @note The returned string @b must be freed by the caller.
*
* @note Even though a COM_STMT_PREPARE can be given to the query
* classifier for parsing, this function will in that case
* return NULL since the id of the statement is provided by
* the server.
*/
char* qc_get_prepare_name(GWBUF* stmt);
/**
* Returns the tables accessed by the statement.
*