[2] | 1 | """ |
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| 2 | This script adds 3 indexes to table columns: library_folder.name, |
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| 3 | library_dataset.name, library_dataset_dataset_association.name. |
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| 4 | """ |
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| 5 | from sqlalchemy import * |
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| 6 | from sqlalchemy.orm import * |
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| 7 | from migrate import * |
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| 8 | import sys, logging |
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| 9 | |
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| 10 | log = logging.getLogger( __name__ ) |
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| 11 | log.setLevel(logging.DEBUG) |
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| 12 | handler = logging.StreamHandler( sys.stdout ) |
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| 13 | format = "%(name)s %(levelname)s %(asctime)s %(message)s" |
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| 14 | formatter = logging.Formatter( format ) |
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| 15 | handler.setFormatter( formatter ) |
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| 16 | log.addHandler( handler ) |
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| 17 | |
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| 18 | metadata = MetaData( migrate_engine ) |
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| 19 | db_session = scoped_session( sessionmaker( bind=migrate_engine, autoflush=False, autocommit=True ) ) |
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| 20 | LibraryFolder_table = Table( "library_folder", metadata, autoload=True ) |
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| 21 | LibraryDatasetDatasetAssociation_table = Table( "library_dataset_dataset_association", metadata, autoload=True ) |
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| 22 | LibraryDataset_table = Table( "library_dataset", metadata, autoload=True ) |
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| 23 | |
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| 24 | def display_migration_details(): |
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| 25 | print "========================================" |
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| 26 | print "This script adds 3 indexes to table columns: library_folder.name," |
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| 27 | print "library_dataset.name, library_dataset_dataset_association.name." |
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| 28 | print "========================================" |
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| 29 | |
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| 30 | def upgrade(): |
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| 31 | display_migration_details() |
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| 32 | # Load existing tables |
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| 33 | metadata.reflect() |
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| 34 | # Add 1 index to the library_folder table |
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| 35 | i = Index( 'ix_library_folder_name', LibraryFolder_table.c.name ) |
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| 36 | try: |
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| 37 | i.create() |
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| 38 | except Exception, e: |
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| 39 | log.debug( "Adding index 'ix_library_folder_name' to library_folder table failed: %s" % ( str( e ) ) ) |
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| 40 | # Add 1 index to the library_dataset_dataset_association table |
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| 41 | i = Index( 'ix_library_dataset_dataset_association_name', LibraryDatasetDatasetAssociation_table.c.name ) |
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| 42 | try: |
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| 43 | i.create() |
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| 44 | except Exception, e: |
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| 45 | log.debug( "Adding index 'ix_library_dataset_dataset_association_name' to library_dataset_dataset_association table failed: %s" % ( str( e ) ) ) |
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| 46 | # Add 1 index to the library_dataset table |
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| 47 | i = Index( 'ix_library_dataset_name', LibraryDataset_table.c.name ) |
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| 48 | try: |
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| 49 | i.create() |
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| 50 | except Exception, e: |
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| 51 | log.debug( "Adding index 'ix_library_dataset_name' to library_dataset table failed: %s" % ( str( e ) ) ) |
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| 52 | def downgrade(): |
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| 53 | log.debug( "Downgrade is not possible." ) |
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