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| 1 | +"""genericize clinvar variants table |
| 2 | +
|
| 3 | +Revision ID: 695b73abe581 |
| 4 | +Revises: 34026092c7f8 |
| 5 | +Create Date: 2025-02-18 11:54:15.243078 |
| 6 | +
|
| 7 | +""" |
| 8 | + |
| 9 | +from alembic import op |
| 10 | +import sqlalchemy as sa |
| 11 | + |
| 12 | + |
| 13 | +# revision identifiers, used by Alembic. |
| 14 | +revision = "695b73abe581" |
| 15 | +down_revision = "34026092c7f8" |
| 16 | +branch_labels = None |
| 17 | +depends_on = None |
| 18 | + |
| 19 | + |
| 20 | +def upgrade(): |
| 21 | + op.rename_table("clinvar_variants", "clinical_controls") |
| 22 | + op.execute("ALTER SEQUENCE clinvar_variants_id_seq RENAME TO clinical_controls_id_seq") |
| 23 | + op.execute("ALTER INDEX clinvar_variants_pkey RENAME TO clinical_controls_pkey") |
| 24 | + |
| 25 | + op.alter_column("clinical_controls", "clinvar_db_version", nullable=False, new_column_name="db_version") |
| 26 | + op.alter_column("clinical_controls", "allele_id", nullable=False, new_column_name="db_identifier") |
| 27 | + op.add_column("clinical_controls", sa.Column("db_name", sa.String(), nullable=True)) |
| 28 | + |
| 29 | + op.create_index("ix_clinical_controls_gene_symbol", "clinical_controls", ["gene_symbol"]) |
| 30 | + op.create_index("ix_clinical_controls_db_name", "clinical_controls", ["db_name"]) |
| 31 | + op.create_index("ix_clinical_controls_db_identifier", "clinical_controls", ["db_identifier"]) |
| 32 | + op.create_index("ix_clinical_controls_db_version", "clinical_controls", ["db_version"]) |
| 33 | + |
| 34 | + op.create_table( |
| 35 | + "mapped_variants_clinical_controls", |
| 36 | + sa.Column("mapped_variant_id", sa.Integer(), nullable=False), |
| 37 | + sa.Column("clinical_control_id", sa.Integer(), nullable=False), |
| 38 | + sa.ForeignKeyConstraint( |
| 39 | + ["mapped_variant_id"], |
| 40 | + ["mapped_variants.id"], |
| 41 | + ), |
| 42 | + sa.ForeignKeyConstraint( |
| 43 | + ["clinical_control_id"], |
| 44 | + ["clinical_controls.id"], |
| 45 | + ), |
| 46 | + sa.PrimaryKeyConstraint("mapped_variant_id", "clinical_control_id"), |
| 47 | + ) |
| 48 | + |
| 49 | + # Convert any existing ClinVar variants into clinical control variants. Since |
| 50 | + # this table is being update from a clinvar specific table, we assume all existing |
| 51 | + # controls are from ClinVar. |
| 52 | + op.execute( |
| 53 | + """ |
| 54 | + INSERT INTO mapped_variants_clinical_controls ( |
| 55 | + mapped_variant_id, |
| 56 | + clinical_control_id |
| 57 | + ) |
| 58 | + SELECT id, clinvar_variant_id |
| 59 | + FROM mapped_variants |
| 60 | + WHERE clinvar_variant_id IS NOT NULL |
| 61 | + """ |
| 62 | + ) |
| 63 | + |
| 64 | + op.execute("UPDATE clinical_controls SET db_name='ClinVar'") |
| 65 | + op.alter_column("clinical_controls", "db_name", nullable=False) |
| 66 | + |
| 67 | + op.drop_index("ix_mapped_variants_clinvar_variant_id", "mapped_variants") |
| 68 | + op.drop_column("mapped_variants", "clinvar_variant_id") |
| 69 | + |
| 70 | + |
| 71 | +def downgrade(): |
| 72 | + op.rename_table("clinical_controls", "clinvar_variants") |
| 73 | + op.execute("ALTER SEQUENCE clinical_controls_id_seq RENAME TO clinvar_variants_id_seq") |
| 74 | + op.execute("ALTER INDEX clinical_controls_pkey RENAME TO clinvar_variants_pkey") |
| 75 | + |
| 76 | + op.drop_index("ix_clinical_controls_gene_symbol", "clinical_controls") |
| 77 | + op.drop_index("ix_clinical_controls_db_name", "clinical_controls") |
| 78 | + op.drop_index("ix_clinical_controls_db_identifier", "clinical_controls") |
| 79 | + op.drop_index("ix_clinical_controls_db_version", "clinical_controls") |
| 80 | + |
| 81 | + op.alter_column("clinvar_variants", "db_version", nullable=False, new_column_name="clinvar_db_version") |
| 82 | + op.alter_column("clinvar_variants", "db_identifier", nullable=False, new_column_name="allele_id") |
| 83 | + op.drop_column("clinvar_variants", "db_name") |
| 84 | + |
| 85 | + op.add_column( |
| 86 | + "mapped_variants", |
| 87 | + sa.Column("clinvar_variant_id", sa.Integer(), sa.ForeignKey("clinvar_variants.id"), nullable=True), |
| 88 | + ) |
| 89 | + |
| 90 | + # Downgrades a many-to-many relationship to a one to many. This will result in data loss. |
| 91 | + op.execute( |
| 92 | + """ |
| 93 | + UPDATE mapped_variants |
| 94 | + SET clinvar_variant_id=mapped_variants_clinical_controls.clinical_control_id |
| 95 | + FROM mapped_variants_clinical_controls |
| 96 | + WHERE mapped_variants_clinical_controls.mapped_variant_id=mapped_variants.id |
| 97 | + """ |
| 98 | + ) |
| 99 | + |
| 100 | + op.create_index("ix_mapped_variants_clinvar_variant_id", "mapped_variants", ["clinvar_variant_id"]) |
| 101 | + op.drop_table("mapped_variants_clinical_controls") |
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