[libpostgresql-jdbc-java] 88/93: Added caching for ResultSetMetaData from Christophe Canovas complete commit
Emmanuel Bourg
ebourg-guest at moszumanska.debian.org
Mon Jan 9 10:18:56 UTC 2017
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ebourg-guest pushed a commit to annotated tag REL9_3_1102
in repository libpostgresql-jdbc-java.
commit 39423885a5036a058e1146c693191028b00b9e71
Author: Dave Cramer <davecramer at gmail.com>
Date: Tue Jul 8 12:47:39 2014 -0400
Added caching for ResultSetMetaData from Christophe Canovas complete commit
---
org/postgresql/jdbc2/AbstractJdbc2ResultSetMetaData.java | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/org/postgresql/jdbc2/AbstractJdbc2ResultSetMetaData.java b/org/postgresql/jdbc2/AbstractJdbc2ResultSetMetaData.java
index c4adf02..8c802b9 100644
--- a/org/postgresql/jdbc2/AbstractJdbc2ResultSetMetaData.java
+++ b/org/postgresql/jdbc2/AbstractJdbc2ResultSetMetaData.java
@@ -20,6 +20,7 @@ public abstract class AbstractJdbc2ResultSetMetaData implements PGResultSetMetaD
protected final Field[] fields;
private boolean fieldInfoFetched;
+ private CacheMetadata _cache;
/*
* Initialise for a result with a tuple set and
@@ -32,6 +33,7 @@ public abstract class AbstractJdbc2ResultSetMetaData implements PGResultSetMetaD
this.connection = connection;
this.fields = fields;
fieldInfoFetched = false;
+ _cache = new CacheMetadata();
}
/*
@@ -192,6 +194,15 @@ public abstract class AbstractJdbc2ResultSetMetaData implements PGResultSetMetaD
if (fieldInfoFetched)
return;
+ // see if cached
+ String idFields = _cache.getIdFields(fields);
+ if (_cache.isCached(idFields)) {
+ // get metadata from cache
+ _cache.getCache(idFields, fields);
+ fieldInfoFetched = true;
+ return;
+ }
+
fieldInfoFetched = true;
StringBuffer sql = new StringBuffer();
@@ -254,6 +265,8 @@ public abstract class AbstractJdbc2ResultSetMetaData implements PGResultSetMetaD
}
}
stmt.close();
+ // put in cache
+ _cache.setCache(idFields, fields);
}
public String getBaseSchemaName(int column) throws SQLException
--
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